Click here to load reader
Upload
lestari-az-zahra
View
681
Download
88
Tags:
Embed Size (px)
Citation preview
Florida Enrich BookGrade 2
PROVIDES daily enrichment activities
MXEFL11AWK2X_EN_Title_V1.indd 1MXEFL11AWK2X_EN_Title_V1.indd 1 2/6/09 8:17:15 PM2/6/09 8:17:15 PM
Copyright © by Houghton Mifflin Harcourt Publishing Company
All rights reserved. No part of this work may be reproduced or transmitted in any form
or by any means, electronic or mechanical, including photocopying or recording, or by
any information storage or retrieval system, without the prior written permission of the
copyright owner unless such copying is expressly permitted by federal copyright law.
Permission is hereby granted to individuals using the corresponding student’s textbook or
kit as the major vehicle for regular classroom instruction to photocopy entire pages from
this publication in classroom quantities for instructional use and not for resale. Requests
for information on other matters regarding duplication of this work should be addressed
to Houghton Mifflin Harcourt Publishing Company, Attn: Contracts, Copyrights, and
Licensing, 9400 SouthPark Center Loop, Orlando, Florida 32819.
Printed in the U.S.A.
ISBN 13: 978-0-15-385493-4
ISBN 10: 0-15-385493-6
If you have received these materials as examination copies free of charge, Houghton Miffl in Harcourt Publishing Company retains title to the materials and they may not be resold. Resale of examination copies is strictly prohibited.
Possession of this publication in print format does not entitle users to convert this publication, or any portion of it, into electronic format.
2 3 4 5 6 7 8 9 10 054 17 16 15 14 13 12 11 10 09
MXEFL11BWK2X_EN_CP.indd 1MXEFL11BWK2X_EN_CP.indd 1 7/3/09 2:26:13 PM7/3/09 2:26:13 PM
iii
ContentsBIG IDEA 1: Number, Place Value, and Patterns
Chapter 1: Place Value and Number Patterns
1.1 Pencil Place Value ............................................................................................. E1
1.2 Expanding Numbers .......................................................................................... E2
1.3 Race to Find the Number ................................................................................. E3
1.4 Marble Mix-Up .................................................................................................. E4
1.5 Odds and Ends ................................................................................................... E5
1.6 More About Skip Counting .............................................................................. E6
1.7 A Sticky Situation .............................................................................................. E7
1.8 What’s the Problem? ......................................................................................... E8
1.9 My Predictions ................................................................................................... E9
Chapter 2: 3-Digit Numbers
2.1 Tic-Tac-Hundred ............................................................................................... E10
2.2 Find the Number ................................................................................................ E11
2.3 Value Clues ......................................................................................................... E12
2.4 Say It in Layers ................................................................................................... E13
2.5 Find the Greater Number ................................................................................. E14
2.6 Comparing .......................................................................................................... E15
2.7 The Middle of the Train ................................................................................... E16
2.8 Find the Number Pattern .................................................................................. E17
Chapter 3: 4-Digit Numbers
3.1 Brick by Brick ..................................................................................................... E18
3.2 Matching ............................................................................................................. E19
3.3 4-Digit Crossword .............................................................................................. E20
3.4 Compare Car Rides ........................................................................................... E21
3.5 Compare 4-Digit Numbers ............................................................................... E22
3.6 Get Your Cards in Order .................................................................................. E23
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
MXEFL11BWK2X_EN_TOC.indd iiiMXEFL11BWK2X_EN_TOC.indd iii 6/30/09 2:21:49 PM6/30/09 2:21:49 PM
iv
BIG IDEA 2: Addition and Subtraction
Chapter 4: Basic Facts and Relationships
4.1 Tic+Tac+Toe ...................................................................................................... E24
4.2 Make-a-Ten Again ............................................................................................. E25
4.3 Fact Family ......................................................................................................... E26
4.4 What Is the Difference? .................................................................................... E27
4.5 Fix It .................................................................................................................... E28
4.6 “Sub”traction Rules ........................................................................................... E29
4.7 Repeat Bakery .................................................................................................... E30
4.8 Balance Things Out ........................................................................................... E31
4.9 A Balancing Act ................................................................................................. E32
Chapter 5: 2-Digit Addition
5.1 Add to the Score ................................................................................................ E33
5.2 Break Apart to Match ....................................................................................... E34
5.3 Tens and Ones Combinations .......................................................................... E35
5.4 Match the Sums .................................................................................................. E36
5.5 Addition in the Air ............................................................................................ E37
5.6 Estimation Time ................................................................................................. E38
5.7 Go Fish ................................................................................................................ E39
5.8 What is the Problem? ........................................................................................ E40
5.9 Adding Errors .................................................................................................... E41
5.10 Butterfl y Addition .............................................................................................. E42
5.11 Trace the Path .................................................................................................... E43
Chapter 6: 2-Digit Subtraction
6.1 Which Difference is Different? ........................................................................ E44
6.2 A Maze of Thirties ............................................................................................. E45
6.3 Subtraction Bingo .............................................................................................. E46
6.4 The Art of Differences ...................................................................................... E47
6.5 Match It Up ........................................................................................................ E48
6.6 Choose the Numbers ......................................................................................... E49
6.7 Subtraction Riddles ........................................................................................... E50
6.8 Race to Zero ....................................................................................................... E51
6.9 How Many Could There Be? ........................................................................... E52
6.10 The Lost Digits ................................................................................................... E53
6.11 Add It Up — Take It Away .............................................................................. E54
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
MXEFL11BWK2X_EN_TOC.indd ivMXEFL11BWK2X_EN_TOC.indd iv 6/30/09 2:21:52 PM6/30/09 2:21:52 PM
v
Chapter 7: 3-Digit Addition
7.1 Domino Break .................................................................................................... E55
7.2 The Read-a-Thon ............................................................................................... E56
7.3 The Nearest Hundred ........................................................................................ E57
7.4 3-Digit Scramble ................................................................................................ E58
7.5 3 on 3 Tournament ............................................................................................. E59
7.6 Paint By Regrouping ......................................................................................... E60
7.7 Addition Wheels ................................................................................................ E61
Chapter 8: 3-Digit Subtraction
8.1 Find the Mistakes ............................................................................................... E62
8.2 What’s the Difference? ..................................................................................... E63
8.3 What Numbers Can You Use? ......................................................................... E64
8.4 Subtraction Steps ............................................................................................... E65
8.5 Check It Out ....................................................................................................... E66
8.6 Follow the Arrows to Subtract ......................................................................... E67
8.7 Mystery Number ................................................................................................ E68
BIG IDEA 3: Measurement and Geometry
Chapter 9: Length
9.1 Compared to Me ................................................................................................ E69
9.2 Compare to Measure ......................................................................................... E70
9.3 The Long and Short of It .................................................................................. E71
9.4 Measure the Tools ............................................................................................. E72
9.5 Map Measurements ........................................................................................... E73
9.6 Handy Measuring ............................................................................................... E74
9.7 How Tall Are You? ........................................................................................... E75
9.8 Length Riddles ................................................................................................... E76
9.9 Centimeter Clips ................................................................................................ E77
9.10 Colorful Veggies ................................................................................................ E78
9.11 Measure by Hand ............................................................................................... E79
9.12 Centi-Meter Fever ............................................................................................. E80
9.13 Distance Drawings ............................................................................................. E81
9.14 Measurement Hike ............................................................................................ E82
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
MXEFL11BWK2X_EN_TOC.indd vMXEFL11BWK2X_EN_TOC.indd v 6/30/09 2:21:54 PM6/30/09 2:21:54 PM
vi
Chapter 10: Weight, Mass, Capacity, and Volume
10.1 Ounces and Pounds ........................................................................................... E83
10.2 Measuring Mass .................................................................................................. E84
10.3 How Many Cups of Juice? ................................................................................ E85
10.4 Liter Beakers ...................................................................................................... E86
10.5 Volume of Irregular Figures ............................................................................. E87
10.6 Balancing Shapes ............................................................................................... E88
Chapter 11: Geometry and Patterns
11.1 Geometric Shape Puzzle ................................................................................... E89
11.2 Build Shapes in Two Ways ............................................................................... E90
11.3 Build It ................................................................................................................ E91
11.4 Equal Parts .......................................................................................................... E92
11.5 Pattern Match ..................................................................................................... E93
11.6 Repeating Patterns ............................................................................................ E94
11.7 Field Day ............................................................................................................. E95
11.8 Circle Pattern ...................................................................................................... E96
Chapter 12: Money and Time
12.1 Find the Total Value .......................................................................................... E97
12.2 What Is the Missing Coin? ................................................................................ E98
12.3 Arrange and Count Coins ................................................................................. E99
12.4 Making Equal Amounts .................................................................................... E100
12.5 Same Amount, Different Ways ........................................................................ E101
12.6 Comparing at the Hardware Store ................................................................... E102
12.7 Make a Dollar ..................................................................................................... E103
12.8 Is There Enough Money? ................................................................................. E104
12.9 Act It Out with Bills .......................................................................................... E105
12.10 Matching the Time ............................................................................................. E106
12.11 Telling Time at the Zoo .................................................................................... E107
12.12 Make a Time Schedule ...................................................................................... E108
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
MXEFL11BWK2X_EN_TOC.indd viMXEFL11BWK2X_EN_TOC.indd vi 6/30/09 2:21:57 PM6/30/09 2:21:57 PM
Name
Enrich© Houghton Mifflin Harcourt Publishing Company
E1 Grade 2
1. 47
2. 39
3. 28
4. 11
5. 52
Pencil Place ValueEach pencil box holds ten pencils. Draw a line from the pencils to the number that shows how many pencils are in each group.
Writing and Reasoning What digits do the pencil boxes represent? What digits do the single pencils represent?
FL Benchmark
MA.2.A.1.1
II Chapter 1, Lesson 1Enrich
MXEFL11AWK2X_EN_C1.indd 1MXEFL11AWK2X_EN_C1.indd 1 6/3/09 3:12:40 PM6/3/09 3:12:40 PM
Name
Enrich© Houghton Mifflin Harcourt Publishing Company
Grade 2E2
1. 68 —
2. —
3. —
4. —
Expanding NumbersDescribe the number in another way. Write the number.
Writing and Reasoning Create your own exercise like the ones above for a friend to complete.
FL Benchmark
MA.2.A.1.2
6 — tens 8 — ones
— = — + —
— = — + —
2 — tens 3 — ones
— = 90 — + 7 —
— tens — ones
— ten — one
— = 10 — + 1 —
II Chapter 1, Lesson 2Enrich
MXEFL11AWK2X_EN_C1.indd 2MXEFL11AWK2X_EN_C1.indd 2 1/21/09 9:57:48 AM1/21/09 9:57:48 AM
Name
Enrich© Houghton Mifflin Harcourt Publishing Company
Grade 2E3
Race to Find the NumberDraw a race car next to each helmet. Label each race car with the correct two-digit number. Then write each number another way.
Writing and Reasoning How did you choose the other way to write each number?
FL Benchmark
MA.2.A.1.2
1.
2.
3.
4.
II Chapter 1, Lesson 3Enrich
20 + 4
1 ten 9 ones
thirty
eighty-five
MXEFL11BWK2X_EN_C1.indd 3MXEFL11BWK2X_EN_C1.indd 3 7/30/09 1:42:41 AM7/30/09 1:42:41 AM
Name
Enrich© Houghton Mifflin Harcourt Publishing Company
Grade 2E4
Marble Mix-UpRead the clue.Think of a 2-digit number that matches the clue. Write the number as tens and ones. Then write the number.
Writing and Reasoning Why do both ways of writing the number of marbles represent the same number?
FL Benchmark
MA.2.A.1.1
1.
— tens — onesThe number is: —
2.
— tens — onesThe number is: —
3.
— tens — onesThe number is: —
4.
— tens — onesThe number is: —
II Chapter 1, Lesson 4Enrich
MXEFL11BWK2X_EN_C1.indd 4MXEFL11BWK2X_EN_C1.indd 4 7/30/09 1:44:29 AM7/30/09 1:44:29 AM
Name
Enrich© Houghton Mifflin Harcourt Publishing Company
Grade 2E5
1
3
5
7
9
19
11 13
15
17
14
12
10
6
82020
4
18
16
Odds and EndsStart at 0 and connect all the even numbers. Then start at 1 and connect all the odd numbers.
Writing and Reasoning What pattern do you notice about even and odd numbers?
FL Benchmark
MA.2.A.4.2
II Chapter 1, Lesson 5Enrich
MXEFL11AWK2X_EN_C1.indd 5MXEFL11AWK2X_EN_C1.indd 5 6/4/09 4:00:47 PM6/4/09 4:00:47 PM
Name
Enrich© Houghton Mifflin Harcourt Publishing Company
Grade 2E6
1 2 3 4 5 6 7 8
11 12 13 14 15 16 17 19
21 22 23 24 25 26 28 29
31 32 33 34 35 37 38 39
41 42 43 44 46 47 48 49
51 52 53 55 56 57 58 59
61 62 64 65 66 67 68 69
71 73 74 75 76 77 78 79
82 83 84 85 86 87 88 89
91 92 93 94 95 96 97 98 99
9
20
30
40
50
60
70
80
90
100
10
18
27
36
45
54
63
72
81
More About Skip CountingRosa is skip counting by different numbers. She starts counting at 0. Read the clues. Circle the number she could be counting by.
Writing and Reasoning Could Rosa be counting by any other numbers for Exercise 2? What are they?
FL Benchmark
MA.2.A.4.1
II Chapter 1, Lesson 6Enrich
1. Rosa shades 68, 70, and 72 on the hundred chart. She could be counting by:
twos fours fives
2. Rosa shades 70 on the hundred chart. She could be counting by:
threes fours fives
3. Rosa shades 39 on the hundred chart. She could be counting by:
twos threes tens
4. Rosa shades 8 and 12 on the hundred chart. She could be counting by:
threes fours fives
MXEFL11BWK2X_EN_C1.indd 6MXEFL11BWK2X_EN_C1.indd 6 7/30/09 1:46:54 AM7/30/09 1:46:54 AM
Name
Enrich© Houghton Mifflin Harcourt Publishing Company
Grade 2E7
A Sticky SituationJamal’s stickers need to be organized. Each type of sticker must be grouped together. Different types of stickers cannot be on the same page. Each page can fi t 2 rows of 3 stickers.
Draw a diagram to show the pages.
Writing and Reasoning How many pages would you need for each type of sticker if each page could fit 3 rows of 4 stickers?
FL Benchmark
MA.2.A.4.3
II Chapter 1, Lesson 7Enrich
1. How many pages do you need for ?
2. How many pages do you need for ?
3. How many pages do you need for ?
4. How many pages do you need for ?
MXEFL11AWK2X_EN_C1.indd 7MXEFL11AWK2X_EN_C1.indd 7 1/21/09 9:58:44 AM1/21/09 9:58:44 AM
Name
Enrich© Houghton Mifflin Harcourt Publishing Company
Grade 2E8
What’s the Problem?Finish the table to show a pattern. Tell a story about the pattern.
Writing and Reasoning Write a problem to go with each table. Exchange with a partner. Solve. Show your work.
FL Benchmark
MA.2.A.4.1
II Chapter 1, Lesson 8Enrich
1.
2.
3.
number of —
1
number of —
5
number of —
1
number of —
3
number of —
3
number of —
18
MXEFL11AWK2X_EN_C1.indd 8MXEFL11AWK2X_EN_C1.indd 8 1/21/09 9:58:54 AM1/21/09 9:58:54 AM
Name
Enrich© Houghton Mifflin Harcourt Publishing Company
Grade 2E9
Make Your Own PredictionsUse a skip counting pattern. Skip count backward.Make a prediction. What number will be in the 10th position?
FL Benchmark
MA.2.A.4.3
II Chapter 1, Lesson 9Enrich
1. What number is in the 10th position?
2. What skip counting pattern did you use?
—
—
1st 2nd 3rd 4th 5th 6th 7th 8th 9th 10th
Use a different skip counting pattern. Skip count forward.Make a prediction. What number will be in the 20th position?
3. What number is in the 20th position?
4. What skip counting pattern did you use?
—
—
11th 12th 13th 14th 15th 16th 17th 18th 19th 20th
Writing and Reasoning How did you make a good prediction about a pattern?
MXEFL11AWK2X_EN_C1.indd 9MXEFL11AWK2X_EN_C1.indd 9 7/8/09 9:11:25 AM7/8/09 9:11:25 AM
Enrich© Houghton Mifflin Harcourt Publishing Company
E10 Grade 2
Name II Chapter 2, Lesson 1Enrich
ten sets of 10 20 tens
b b b
12 sets of 10 seventeen tens
b b b
19 tens 17 tens 0 ones
b b b
Writing and Reasoning Draw another board. Write clues in each box that tell how many tens are in each number. Give your puzzle to a classmate to solve.
Tic-Tac-HundredFind the value of each space on the board.
Find three spaces in a row with the same value to get Tic-Tac-Hundred. Draw a line to connect them.
FL Benchmark
MA.2.A.1.1
MXEFL11BWK2X_EN_C2.indd 10MXEFL11BWK2X_EN_C2.indd 10 6/10/09 4:09:14 PM6/10/09 4:09:14 PM
Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E11 Grade 2
Find the NumberRead the clues. Find the number.
1. A number is 4 hundreds more than 142. What is the number?
542 —
2. A number is 2 hundreds more than 355. What is the number?
—
3. A number is 3 tens more than 249. What is the number?
—
4. A number is 7 tens more than 624. What is the number?
—
5. A number is 8 ones more than 331. What is the number?
—
6. A number is 4 hundreds more than 399. What is the number?
—
7. A number is 2 tens more than 923. What is the number?
—
8. A number is 6 ones more than 772. What is the number?
—
Writing and Reasoning How did you find the answer to each question?
FL Benchmark
MA.2.A.1.1
II Chapter 2, Lesson 2Enrich
MXEFL11BWK2X_EN_C2.indd 11MXEFL11BWK2X_EN_C2.indd 11 6/10/09 4:09:18 PM6/10/09 4:09:18 PM
Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E12 Grade 2
II Chapter 2, Lesson 3Enrich
FL Benchmark
MA.2.A.1.1
Writing and Reasoning Write a number that does not appear above. Use the same digits. Then write clues for your number.
Value CluesUse the digits 8, 7, and 3 to make numbers. Use all three digits. Read the clues and write the numbers.
1.
The value of the digit 8 in this number is 80.
The value of the digit 7 in this number is not 7.
The number is —
.
2.
The value of the digit 8 in this number is 800.
The value of the digit 7 in this number is not 70.
The number is —
.
3.
The value of the digit 8 in this number is 8.
The value of the digit 7 in this number is not 700.
The number is —
.
4.
The value of the digit 7 in this number is 70.
The value of the digit 3 in this number is not 30.
The number is —
.
MXEFL11BWK2X_EN_C2.indd 12MXEFL11BWK2X_EN_C2.indd 12 6/10/09 4:09:20 PM6/10/09 4:09:20 PM
Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E13 Grade 2
534 684
429 150
II Chapter 2, Lesson 4Enrich
FL Benchmark
MA.2.A.1.2
Writing and Reasoning Which pyramid has the greatest value? Explain your reason.
Say It in LayersA step pyramid has different layers.
Fill in each layer of the pyramid with two different ways of writing the number at the top.
1. 2.
3. 4.
MXEFL11AWK2X_EN_C2.indd 13MXEFL11AWK2X_EN_C2.indd 13 1/21/09 10:00:48 AM1/21/09 10:00:48 AM
Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E14 Grade 2
Find the Greater Number1. Write a word problem about comparing 620 and 627
to find the greater number. Draw a model to show the solution.
2. Choose two 3-digit numbers. Write a word problem about comparing the numbers. Find the greater number. Draw a model to show the solution.
FL Benchmark
MA.2.A.1.3
II Chapter 2, Lesson 5Enrich
Writing and Reasoning How did you find the greater number?
MXEFL11BWK2X_EN_C2.indd 14MXEFL11BWK2X_EN_C2.indd 14 7/31/09 11:47:23 PM7/31/09 11:47:23 PM
Enrich© Houghton Mifflin Harcourt Publishing Company
Name
Grade 2E15
ComparingWrite each digit once to build a number that will make the sentence true.
1. 9, 6, 1
—
—
—
< 178
2. 2, 5, 8
—
—
—
< 852
3. 9, 3, 4
—
—
—
> 439
4. 1, 8, 7
187 > —
—
—
5. 2, 6
42 — > 2 — 1
6. 7, 3
33 — > — 36
7. 8, 5
3 — 7 < — 67
8. 9, 5, 4
— — 7 > — 67
Writing and Reasoning Write a digit to make the sentence true.
—
84 > 873Is there more than one digit you could use? Explain.
FL Benchmark
MA.2.A.1.3
II Chapter 2, Lesson 6Enrich
MXEFL11BWK2X_EN_C2.indd 15MXEFL11BWK2X_EN_C2.indd 15 6/10/09 4:09:30 PM6/10/09 4:09:30 PM
Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E16 Grade 2
843 921 321 459
The Middle of the TrainUse the numbers at the top of the page. Write each number in a train car. Use each number once. Check that the numbers on each set of train cars is in order.
1.
366 > — > 312
2.
978 > —
> 820
3.
432 < — < 465
4.
988 > — > 856
Writing and Reasoning Complete. Explain your answer.
675 < —
< 824
II Chapter 2, Lesson 7Enrich
FL Benchmark
MA.2.A.1.3
MXEFL11BWK2X_EN_C2.indd 16MXEFL11BWK2X_EN_C2.indd 16 6/10/09 4:09:34 PM6/10/09 4:09:34 PM
Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E17 Grade 2
322
422
224
153522
622
722
314304
294
284274
234244
254
264153
193
183
163
214
153
157222
200
101 412
222
506
351
453
275
281
220
199
Find the Number PatternUse a number pattern. Trace a path from least to greatest to lead the squirrel to the tree.
Writing and Reasoning What pattern did you use to find the next number to move to on the path?
II Chapter 2, Lesson 8Enrich
FL Benchmark
MA.2.A.1.1
MXEFL11BWK2X_EN_C2.indd 17MXEFL11BWK2X_EN_C2.indd 17 7/9/09 4:26:26 PM7/9/09 4:26:26 PM
Name
E18Enrich Grade 2© Houghton Mifflin Harcourt Publishing Company
FL Benchmark
MA.2.A.1.1
Writing and Reasoning Explain how ones, tens, hundreds, and thousands are related.
II Chapter 3, Lesson 1Enrich
Brick by BrickWrite a number story about building a brick playhouse. Bricks come in stacks of 100. You will need more than 1,000 bricks but less than 9,000 bricks. Decide how many bricks you may need in all and draw to explain.
MXEFL11AWK2X_EN_C3.indd 18MXEFL11AWK2X_EN_C3.indd 18 8/11/09 3:21:51 AM8/11/09 3:21:51 AM
Name
E19Enrich Grade 2© Houghton Mifflin Harcourt Publishing Company
MatchingDraw a line to connect each model and shovel to the pail of the number it matches. Write the number on the pail.
II Chapter 3, Lesson 2Enrich
FL Benchmark
MA.2.A.1.1
Writing and Reasoning How did you know which shovels and pails matched? Explain.
2 thousands4 hundreds7 tens5 ones
2 thousands1 hundred8 tens9 ones2 thousands3 hundreds7 tens1 one
1 thousand8 hundreds2 tens7 ones
MXEFL11AWK2X_EN_C3.indd 19MXEFL11AWK2X_EN_C3.indd 19 7/8/09 9:52:43 AM7/8/09 9:52:43 AM
Name
E20Enrich Grade 2© Houghton Mifflin Harcourt Publishing Company
*
1
2
3
5 6
7
8
4
4-Digit CrosswordUse what you know about writing numbers in different ways to complete the crossword. Each answer will be a 4-digit number.
Down
1. 1,000 + 200 + 30 + 4
4. seven thousand, nine hundred fifty-four
6. 2,000 + 500 + 80 + 9
Across
2. five thousand, two hundred seventy-six
3. 1 thousand 4 hundreds 8 tens 7 ones
5. 5,000 + 500 + 50 + 5
7. 4 thousands 6 hundreds 5 tens 7 ones
8. six thousand, nine hundred thirty-six
FL Benchmark
MA.2.A.1.2
Writing and Reasoning Write your own clue and solution for the last remaining column in the crossword puzzle.
II Chapter 3, Lesson 3Enrich
MXEFL11AWK2X_EN_C3.indd 20MXEFL11AWK2X_EN_C3.indd 20 1/21/09 10:04:21 AM1/21/09 10:04:21 AM
Name
E21Enrich Grade 2© Houghton Mifflin Harcourt Publishing Company
Compare Car RidesUse the chart to compare road trips between capital cities. Compare the distance between Tallahassee and each city.
1. Which trip is a greater distance from Tallahassee, Denver or
Sacramento? ———
2. Which trip is fewer miles from Tallahassee, Austin or Oklahoma
City? ———
3. Which trip is the greatest distance from Tallahassee?
———
FL Benchmark
MA.2.A.1.2
Distance from Florida’s capital, TALLAHASSEE
Anchorage, Alaska 4,616 milesAustin, Texas 893 milesDenver, Colorado 1,632 milesOklahoma City, Oklahoma 1,003 milesPhoenix, Arizona 1,882 milesSacramento, California 2,637 miles
Writing and Reasoning Choose two cities you would like to visit from the list above. Write the distance for each trip and circle the trip that is the greater number of miles from Tallahassee.
II Chapter 3, Lesson 4Enrich
MXEFL11AWK2X_EN_C3.indd 21MXEFL11AWK2X_EN_C3.indd 21 6/9/09 2:08:27 PM6/9/09 2:08:27 PM
Name
E22Enrich Grade 2© Houghton Mifflin Harcourt Publishing Company
Compare 4-Digit NumbersCircle any mistakes you see in the problemsbelow. Write the correction above the mistake.
1. 3,250 = 3,520 2. 1,655 > 1,099
3. 9,876 < 9,456 4. 1,233 > 1,333
5. 7,000 > 6,898 6. 5,443 < 5,343
7. 7,331 = 1,431 8. 8,221 > 8,121
9. 2,657 < 2,757 10. 4,999 < 4,899
FL Benchmark
MA.2.A.1.2
Writing and Reasoning What strategy did you use to compare numbers? Explain.
II Chapter 3, Lesson 5Enrich
MXEFL11AWK2X_EN_C3.indd 22MXEFL11AWK2X_EN_C3.indd 22 6/12/09 10:36:56 AM6/12/09 10:36:56 AM
Name
E23Enrich Grade 2© Houghton Mifflin Harcourt Publishing Company
9 274
KARI
3 428
CATHY
7 953
BRIAN
8 142
JARED
5 867
VIC
8 946
WENDY
Get Your Cards in OrderWrite the greatest 4-digit number you can make from each friend’s cards. Circle the greatest number in each group. Then, write the numbers in each group in order from least to greatest.
—— < ——
< ——
least greatest
—— < ——
< ——
least greatest
FL Benchmark
MA.2.A.1.3
Writing and Reasoning Write the three greatest numbers you were able to make in order from greatest to least.
II Chapter 3, Lesson 6Enrich
MXEFL11AWK2X_EN_C3.indd 23MXEFL11AWK2X_EN_C3.indd 23 6/12/09 10:37:26 AM6/12/09 10:37:26 AM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
E24
Name
FL Benchmark
MA.2.A.2.1
II Chapter 4, Lesson 1Enrich
Tic+Tac+ToeWrite the sums in each box. Draw a line through three boxes in a row that have one of the same sums.
Writing and Reasoning Draw a loop around each box with number sentences that have 0 as an addend. Did you win Tic+Tac+Toe again? Explain why.
9 + 0 = _
0 + 7 = _
6 + 0 = _
0 + 8 = _
5 + 0 = _
0 + 2 = _
5 + 5 = _
5 + 4 = _
4 + 4 = _
4 + 5 = _
3 + 3 = _
3 + 4 = _
7 + 4 = _
4 + 7 = _
6 + 6 = _
6 + 5 = _
6 + 3 = _
3 + 6 = _
7 + 8 = _
8 + 7 = _
9 + 2 = _
2 + 9 = _
4 + 4 = _
4 + 3 = _
9 + 9 = _
9 + 8 = _
0 + 0 = _
4 + 0 = _
5 + 2 = _
2 + 5 = _
3 + 3 = _
3 + 2 = _
6 + 6 = _
6 + 7 = _
6 + 1 = _
1 + 6 = _
MXEFL11AWK2X_EN_C4.indd 24MXEFL11AWK2X_EN_C4.indd 24 6/4/09 7:18:04 AM6/4/09 7:18:04 AM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E25
FL Benchmark
MA.2.A.2.1
II Chapter 4, Lesson 2Enrich
Make-a-Ten AgainCircle ten. Then write the make-a-ten fact to solve for the total number of animals.
Writing and Reasoning How did you decide which make-a-ten fact to use? Explain.
8 _ + 5 _ = ?
10 _ + 3 _ = 13 _
_ + _ = ? _ + _ = _
_ + _ = ? _ + _ = _
_ + _ = ? _ + _ = _
MXEFL11AWK2X_EN_C4.indd 25MXEFL11AWK2X_EN_C4.indd 25 6/4/09 7:24:54 AM6/4/09 7:24:54 AM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E26
7
4 3
11
6 5
14
5 9
13
7 6
FL Benchmark
MA.2.A.2.1
II Chapter 4, Lesson 3Enrich
Fact FamilyUse the numbers inside each triangle to write a set of related facts. Write two addition and two subtraction sentences for each triangle.
Writing and Reasoning Draw another fact family triangle. Have a partner write the related subtraction and addition facts.
3 _ + 4 _ = 7 _
_ + _ = _
7 _ - 3 _ = 4 _
_ - _ = _
_ + _ = _
_ + _ = _
_ - _ = _
_ - _ = _
_ + _ = _
_ + _ = _
_ - _ = _
_ - _ = _
_ + _ = _
_ + _ = _
_ - _ = _
_ - _ = _
MXEFL11AWK2X_EN_C4.indd 26MXEFL11AWK2X_EN_C4.indd 26 6/6/09 12:23:45 PM6/6/09 12:23:45 PM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E27
FL Benchmark
MA.2.A.2.1
II Chapter 4, Lesson 4Enrich
What Is the Difference?Each box has four subtraction sentences.
Two are written across. The other two are written down.
Fill in the missing numbers so each subtraction sentence is correct.
1. 2.
3. 4.
Writing and Reasoning How did you find the missing numbers in the top row in Exercise 4?
12 - 6 = 8 - =
- 5 = - 3 =
-
=
9
-
=
4
-
=
4
-
=
-
=
-
=
5
-
6
=
-
4
=
3
- = 1
- = - 1 =
- 4 =
6 _
_
8 _
_
_ _
3 _ _
_ _
_ _
_ 3 _
_
_
_
MXEFL11AWK2X_EN_C4.indd 27MXEFL11AWK2X_EN_C4.indd 27 6/6/09 12:23:48 PM6/6/09 12:23:48 PM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E28
Fix ItJake completed the tables below, but he made one mistake in the Out column of each table. Cross out each mistake. Write the correct number next to each cross out.
1. Rule: Add 4. 2. Rule: Add 3. 3. Rule: Add 7.
4. Rule: Add 6. 5. Rule: Add 9. 6. Rule: Add 8.
In Out
5 9
4 8
7 12
9 13
In Out
6 9
8 11
7 10
9 13
In Out
4 11
6 14
9 16
5 12
FL Benchmark
MA.2.A.4.5
II Chapter 4, Lesson 5Enrich
Writing and Reasoning The rule is Add 4. If the Out number is 12, what is the In number? Explain.
In Out
3 11
4 12
6 13
8 16
In Out
4 10
9 14
8 14
0 6
In Out
1 10
5 13
7 16
8 17
MXEFL11AWK2X_EN_C4.indd 28MXEFL11AWK2X_EN_C4.indd 28 6/4/09 7:28:53 AM6/4/09 7:28:53 AM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E29
12 17 13 15
Out
In
Rule: -8
Rule: -7
Rule: -5
Rule: -6
Rule: -9 14 11 10 9
Out
In
14 12 13 9
Out
In
9 11 12 8
Out
In
14 17 13 9
Out
In
FL Benchmark
MA.2.A.4.5
II Chapter 4, Lesson 6Enrich
“Sub”traction RulesThese submarines are on a search to fi nd missing numbers.
Use the rule on each submarine to complete the tables.
Writing and Reasoning Make your own subtraction submarine and have a classmate complete it.
MXEFL11AWK2X_EN_C4.indd 29MXEFL11AWK2X_EN_C4.indd 29 6/6/09 12:23:52 PM6/6/09 12:23:52 PM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E30
MUFFINS
BAGELS
SUGAR COOKIES
OATMEAL COOKIES
Muffins: 4 per tray
Bagels: 6 per basket
sugar: 7 per tray oatmeal: 8 per tray
Cookies:
FL Benchmark
MA.2.A.6.1
II Chapter 4, Lesson 7Enrich
Repeat BakeryDraw pictures and write the total number for each item the baker is selling.
Writing and Reasoning Write a problem like the one above.
MXEFL11AWK2X_EN_C4.indd 30MXEFL11AWK2X_EN_C4.indd 30 6/4/09 7:31:31 AM6/4/09 7:31:31 AM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E31
116 +
8 +
12 4 +
15 + 6
17
10
+ 5
13 + 5
FL Benchmark
MA.2.A.4.4
II Chapter 4, Lesson 8Enrich
Balance Things OutWrite the missing addend to make the sides balance.
Writing and Reasoning Write your own balancing problem like the problems above.
MXEFL11AWK2X_EN_C4.indd 31MXEFL11AWK2X_EN_C4.indd 31 6/4/09 7:32:56 AM6/4/09 7:32:56 AM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E32
2 2
5 4 0 1
3 2
1 5
3 4
2 1
4 0
1 7 3 2
5 4 3 2
6 2
3 7
1 2 5
6 4
2 7
3 4 5 5
8 3
FL Benchmark
MA.2.A.4.4
II Chapter 4, Lesson 9Enrich
A Balancing ActLook at the numbers in each grid. Write numbers in each row so that all four rows have the same sum.
1. 2.
3. 4.
Writing and Reasoning Explain how you decided what numbers to write in the grid for Exercise 2.
MXEFL11AWK2X_EN_C4.indd 9MXEFL11AWK2X_EN_C4.indd 9 7/13/09 2:10:33 PM7/13/09 2:10:33 PM
Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E33 Grade 2
1 2 3 4 5 6 7 8
11 12 13 14 15 16 17 19
21 22 23 24 25 26 28 29
31 32 33 34 35 37 38 39
41 42 43 44 46 47 48 49
51 52 53 55 56 57 58 59
61 62 64 65 66 67 68 69
71 73 74 75 76 77 78 79
82 83 84 85 86 87 88 89
91 92 93 94 95 96 97 98 99
9
20
30
40
50
60
70
80
90
100
10
18
27
36
45
54
63
72
81
II Chapter 5, Lesson 1Enrich
FL Benchmark
MA.2.A.2.2Add to the ScoreUse the hundred chart to help you solve the problems.
Color the numbers you used to solve each problem on the hundred chart. Use a different color for each exercise.
Writing and Reasoning Choose a numberless than 50. Add 24 to your number. Describe thepath to follow to find the sum.
1. 12 + 33 = — 4. 13 + 32 = —
2. 17 + 30 = — 5. 45 + 3 = —
3. 45 + 50 = — 6. 18 + 30 = —
MXEFL11BWK2X_EN_C5.indd 33MXEFL11BWK2X_EN_C5.indd 33 3/5/94 7:52:03 AM3/5/94 7:52:03 AM
Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E34 Grade 2
Break Apart to MatchDraw a line to connect each number sentence on the left to its matching break-apart sentence on the right.
12 + 9 = — • • 50 + 1 = —
27 + 6 = — • • 20 + 7 = —
45 + 6 = — • • 60 + 7 = —
32 + 9 = — • • 20 + 1 = —
18 + 9 = — • • 40 + 4 = —
66 + 7 = — • • 40 + 1 = —
39 + 5 = — • • 30 + 3 = —
58 + 9 = — • • 70 + 3 = —
FL Benchmark
MA.2.A.2.2
II Chapter 5, Lesson 2Enrich
Writing and Reasoning Write the sum for each problem. See if the sums for matching addition sentences are the same to check your work.
MXEFL11AWK2X_EN_C5_V12.indd 34MXEFL11AWK2X_EN_C5_V12.indd 34 1/21/09 10:11:56 AM1/21/09 10:11:56 AM
Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E35 Grade 2
Tens and Ones CombinationsUse the tens and ones numbers in the box to complete each problem. Some numbers can be used more than once. Then write the sums for the tens and for the ones.
II Chapter 5, Lesson 3Enrich
FL Benchmark
MA.2.A.2.2
50 4 30 9 20
40 7 60 8
10 5 2 3 70
Writing and Reasoning Explain how you decided which tens and ones numbers to use for Exercise 4.
1.
2.
3.
4.
30 —
+ —
—
+ —
—
+ —
= 92
—
+ —
—
+ —
—
+ —
= 71
—
+ —
—
+ —
—
+ —
= 93
—
+ —
—
+ —
—
+ —
= 100
+ +
++
MXEFL11BWK2X_EN_C5.indd 35MXEFL11BWK2X_EN_C5.indd 35 7/10/09 2:26:45 PM7/10/09 2:26:45 PM
Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E36 Grade 2
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Match the SumsDraw a line to connect each number sentence on the left to the number sentence on the rightthat has the same sum.
19 + 37 = 30 + 28 =
43 + 18 = 20 + 36 =
56 + 27 = 60 + 10 =
32 + 19 = 31 + 20 =
67 + 23 = 41 + 20 =
29 + 29 = 40 + 44 =
39 + 45 = 60 + 23 =
58 + 12 = 70 + 20 =
II Chapter 5, Lesson 4Enrich
FL Benchmark
MA.2.A.2.2
Writing and Reasoning Write two pairs of addition sentences that have matching sums.
MXEFL11BWK2X_EN_C5.indd 36MXEFL11BWK2X_EN_C5.indd 36 7/10/09 2:35:17 PM7/10/09 2:35:17 PM
Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E37 Grade 2
FL Benchmark
MA.2.A.2.2
II Chapter 5, Lesson 5Enrich
Addition in the Air Solve each problem. Write the sum in the basket.
1.
3.
2.
4.
Writing and Reasoning If a sum has a 4 in the tens place, color its balloon red; a 5 in the tens place, color its balloon orange; a 6 in the tens place, color its balloon green; and a 7 in the tens place, color its balloon yellow.
There are 43 large balloons and 27 small balloons. How many balloons are there in all?
There are 25 red balloons and 27 blue balloons. How many balloons are there in all?
Andre flew 37 balloons. His dad flew 31. How many balloons did they fly in all?
Arne saw 17 balloons. Patricia saw 29. How many balloons did they see in all?
—
balloons — balloons
—
balloons — balloons
MXEFL11BWK2X_EN_C5.indd 37MXEFL11BWK2X_EN_C5.indd 37 6/11/09 7:24:07 AM6/11/09 7:24:07 AM
Enrich© Houghton Mifflin Harcourt Publishing Company
Name
Grade 2E38
34 22
37
2843
14
30
Estimation TimeLook at the number on each sheep’s tag. Write the nearest tens number for each on the sheep. Circle 3 sheep tags that would have an estimated sum that is less than 100.
II Chapter 5, Lesson 6Enrich
FL Benchmark
MA.2.A.2.3
Writing and Reasoning What is a different combination of 3 numbers that would have an estimated sum that is less than 100?
MXEFL11BWK2X_EN_C5.indd 38MXEFL11BWK2X_EN_C5.indd 38 3/5/94 7:52:31 AM3/5/94 7:52:31 AM
Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E39 Grade 2
II Chapter 5, Lesson 7Enrich
FL Benchmark
MA.2.A.2.2
Writing and Reasoning Write a number sentence for the blank fish so there are two fish for each color listed.
52 → orange 61 → red 73 → green 84 → blue
37 + 36 =
tens ones
14 + 47 =
tens ones
48 + 36 =
tens ones
+ =
tens ones
47 + 37 =
tens ones
26 + 26 =
tens ones
37 + 36 =
tens ones
39 + 22 =
tens ones
Go FishWrite the total number of tens and ones for each fi sh.
Write the sum on the tail. Use the code to color the fi sh.
MXEFL11BWK2X_EN_C5.indd 39MXEFL11BWK2X_EN_C5.indd 39 3/5/94 7:52:35 AM3/5/94 7:52:35 AM
Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E40 Grade 2
Tens Ones
Tens Ones
II Chapter 5, Lesson 8Enrich
FL Benchmark
MA.2.A.2.2What is the Problem?The models below can be used to solve problems.Write a problem for each model. The fi rst problem is started for you.
1.
2.
Writing and Reasoning Draw quick pictures of models for another problem and solve.
Jimmy collected 35 apples.
MXEFL11BWK2X_EN_C5.indd 40MXEFL11BWK2X_EN_C5.indd 40 6/11/09 7:24:28 AM6/11/09 7:24:28 AM
Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E41 Grade 2
B1 2
+ 4 9
15
Tens Ones
B1 2
+ 4 9
1
1
6
Tens Ones
B3 7
+ 4 53
1
8
Tens Ones
B3 7
+ 4 5
Tens Ones
B22
6+ 2 6
24
Tens Ones
B2 6
+ 2 6
Tens Ones
B71
2+ 1 9
18
Tens Ones
B7 2
+ 1 9
Tens Ones
II Chapter 5, Lesson 9Enrich
FL Benchmark
MA.2.A.2.2Adding ErrorsFind the errors in the addition problems. Circle the errors. Then show how to do the problem correctly.
1. 2.
3. 4.
Writing and Reasoning Describe the error you found in Exercise 4.
MXEFL11BWK2X_EN_C5.indd 41MXEFL11BWK2X_EN_C5.indd 41 3/5/94 7:52:43 AM3/5/94 7:52:43 AM
Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E42 Grade 2
19 + 52
45 + 18
17 + 34
26 + 49 38 + 18
+
5 1 +
6 3
+
5 6 +
7 5
+
7 1
Butterfly AdditionMatch each caterpillar to the correct sum on a butterfl y. You may wish to rewrite the problem on the butterfl y.
II Chapter 5, Lesson 10Enrich
FL Benchmark
MA.2.A.2.2
Writing and Reasoning Choose one of the sums. Write a number sentence with this sum and two 2-digit addends that does not involve regrouping.
MXEFL11BWK2X_EN_C5.indd 42MXEFL11BWK2X_EN_C5.indd 42 3/5/94 7:52:47 AM3/5/94 7:52:47 AM
Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E43 Grade 2
18+18
24+17
25+34
17+25
36+2652
+1833
+4542+38
71+19
62+29
START
Trace the PathTrace your way around the treasure map.
Find each sum. Draw the path by following the sums from least to greatest.
II Chapter 5, Lesson 11Enrich
FL Benchmark
MA.2.A.2.2
Writing and Reasoning What are two 2-digit numbers that have a sum of 83?
MXEFL11BWK2X_EN_C5.indd 43MXEFL11BWK2X_EN_C5.indd 43 3/5/94 7:52:52 AM3/5/94 7:52:52 AM
Enrich© Houghton Mifflin Harcourt Publishing Company
E44 Grade 2
Name II Chapter 6, Lesson 1Enrich
Writing and Reasoning What can you do to the crossed off number sentence in Exercise 4 to get the same difference?
FL Benchmark
MA.2.A.2.2Which Difference Is Different?Use a hundred chart to fi nd the difference for each subtraction sentence. Cross out the different difference in each exercise.
1.50 - 30 = — 60 - 40 = — 50 - 20 = —
2.64 - 20 = — 64 - 22 = — 50 - 8 = —
3.36 - 9 = — 43 - 13 = — 34 - 7 = —
4.50 - 18 = — 52 - 18 = — 45 - 11 = —
5.36 - 18 = — 40 - 12 = — 40 - 22 = —
6.32 - 6 = — 36 - 10 = — 46 - 30 = —
MXEFL11AWK2X_EN_C6_V14.indd 44MXEFL11AWK2X_EN_C6_V14.indd 44 1/21/09 10:21:00 AM1/21/09 10:21:00 AM
Enrich© Houghton Mifflin Harcourt Publishing Company
E45 Grade 2
Name II Chapter 6, Lesson 2Enrich
FL Benchmark
MA.2.A.2.2A Maze of ThirtiesHelp the kitten fi nd her ball of yarn.
Break apart ones if needed to fi nd the difference in each box. Color the boxes with a difference of 30, 31, or 32.
Writing and Reasoning Write two more number sentences with a difference of 32 in the empty boxesso the kitten can get to her bowl of milk.
39 - 7 = — 45 - 4 = — 47 - 7 = —
37 - 5 = — 38 - 8 = —
49 - 5 = — 38 - 7 = —
38 - 6 = —
25 - 8 = — 40 - 8 = — 37 - 7 = —
27 - 6 = — 28 - 5 = — 39 - 8 = —
37 - 6 = —
MXEFL11BWK2X_EN_C6.indd 45MXEFL11BWK2X_EN_C6.indd 45 7/14/09 2:49:53 PM7/14/09 2:49:53 PM
Enrich© Houghton Mifflin Harcourt Publishing Company
E46 Grade 2
Name II Chapter 6, Lesson 3Enrich
FL Benchmark
MA.2.A.2.2Subtraction BingoFind the difference for each subtraction sentence. Break apart numbers or use a number line to help you.
Draw a line through squares with the same difference.
35 - 14 = —
26 - 14 = —
35 - 19 = —
33 - 19 = —
62 - 36 = —
29 - 12 = —
39 - 18 = —
42 - 19 = —
64 - 29 = —
53 - 28 = —
55 - 16 = —
43 - 28 = —
32 - 19 = —
53 - 12 = —
52 - 9 = —
61 - 25 = —
41 - 13 = —
47 - 26 = —
68 - 39 = —
57 - 19 = —
62 - 17 = —
46 - 28 = —
54 - 17 = —
40 - 19 = —
Writing and Reasoning Write two more problems with a difference of twenty-one. Be sure to have two 2-digit numbers in each problem.
MXEFL11AWK2X_EN_C6_V14.indd 46MXEFL11AWK2X_EN_C6_V14.indd 46 1/21/09 10:21:24 AM1/21/09 10:21:24 AM
Enrich© Houghton Mifflin Harcourt Publishing Company
E47 Grade 2
Name II Chapter 6, Lesson 4Enrich
FL Benchmark
MA.2.A.2.2The Art of DifferencesDraw a diagram to solve each problem.
Emilio needs 34 markers for his project. He has only 22.
How many more markers does he need?
— markers
37 proj ects were drying on the counter. 24 students picked up their projects. How many projects are
still on the counter?
—
projects
Terrell had 97 pieces of paper to draw on. He used 63. How many pieces does he have left?
— pieces of paper
26 students made paintings in class. 17 of those students are
girls. How many are boys?
— boys
Writing and Reasoning Write your own 2-digit subtraction word problem about art class.
MXEFL11BWK2X_EN_C6.indd 47MXEFL11BWK2X_EN_C6.indd 47 7/15/09 7:58:38 PM7/15/09 7:58:38 PM
Enrich© Houghton Mifflin Harcourt Publishing Company
E48 Grade 2
Name II Chapter 6, Lesson 5Enrich
FL Benchmark
MA.2.A.2.3Match It UpFind the nearest ten for each number. Match each number sentence to its estimate on the right.
1.82 - 46 = — 20
2.38 - 23 = — 20
3.69 - 13 = — 30
4.60 - 42 = — 30
5.58 - 27 = — 60
6.78 - 27 = — 50
7.80 - 17 = — 60
8.96 - 18 = — 80
Writing and Reasoning Solve each of the problems above once you have matched it with its estimate.
MXEFL11BWK2X_EN_C6.indd 48MXEFL11BWK2X_EN_C6.indd 48 6/11/09 7:43:53 AM6/11/09 7:43:53 AM
Enrich© Houghton Mifflin Harcourt Publishing Company
E49 Grade 2
Name II Chapter 6, Lesson 6Enrich
FL Benchmark
MA.2.A.2.2Choose the NumbersUse the numbers below to make subtraction problems with regrouping. Then solve. Draw a picture to help you.
28 33 45 43 39 36
Subtract —
from —
.
—
tens —
ones
—
Subtract —
from —
.
—
tens —
ones
—
Subtract —
from —
.
—
tens —
ones
—
Subtract —
from —
.
—
tens —
ones
—
Writing and Reasoning How did you know if a problem needed regrouping?
MXEFL11BWK2X_EN_C6.indd 49MXEFL11BWK2X_EN_C6.indd 49 6/11/09 7:24:16 AM6/11/09 7:24:16 AM
Enrich© Houghton Mifflin Harcourt Publishing Company
E50 Grade 2
Name II Chapter 6, Lesson 7Enrich
FL Benchmark
MA.2.A.2.2Subtraction RiddlesSolve each subtraction problem. Each difference matches up with a letter. Write that letter below your answer to solve the riddle.
A21
B32
C9
D11
E40
F49
G17
H2
I16
J10
K23
L51
M28
N26
O29
P71
Q65
R50
S14
T1
U34
V18
W52
X44
Y47
Z8
What falls in winter but never gets hurt?
————
What room can no one enter?
————
What has a mouth but can never eat?
A ————
Writing and Reasoning Write another riddle using the code.
50 -22
_
44 -10
_
28 -14
_
38 -36
_
75 -25
_
50 -21
_
38 - 9
_
54 -26_
21 - 7
_
44 -18
_
38 - 9
_
63 -11_
67 -17
_
28 -12
_
57 -39
_
60 -20
_
59 - 9
_
MXEFL11BWK2X_EN_C6.indd 50MXEFL11BWK2X_EN_C6.indd 50 7/14/09 2:17:33 PM7/14/09 2:17:33 PM
Enrich© Houghton Mifflin Harcourt Publishing Company
E51 Grade 2
Name
85;
68;
36;
48;
51;
72;
60;
34;
24;
17;
START
FINISH
II Chapter 6, Lesson 8Enrich
FL Benchmark
MA.2.A.2.2Race to ZeroSubtract along the race course to fi nd the winner.
Each car has a number. Subtract that number from each pit stop along the course. The winning car is the one to reach zero.
Writing and Reasoning What could you subtract from the car in second place to make it a tie?
MXEFL11AWK2X_EN_C6_V14.indd 51MXEFL11AWK2X_EN_C6_V14.indd 51 1/21/09 10:24:43 AM1/21/09 10:24:43 AM
Enrich© Houghton Mifflin Harcourt Publishing Company
E52 Grade 2
Name II Chapter 6, Lesson 9Enrich
FL Benchmark
MA.2.A.2.2How Many Could There Be?Write and solve two subtraction problems that show how many of each animal there might be. Then write the numbers.
1. There are four different kinds of animals on the farm.
There is a different number of each kind of animal.
There are 19 more cows than sheep.
There are 19 more ducks than hens.
There are more hens than cows.
—
cows
—
sheep
—
ducks
—
hens
Writing and Reasoning How did you find the answers?
MXEFL11BWK2X_EN_C6.indd 52MXEFL11BWK2X_EN_C6.indd 52 7/14/09 2:19:13 PM7/14/09 2:19:13 PM
Enrich© Houghton Mifflin Harcourt Publishing Company
E53 Grade 2
Name
4 82 1
43
Tens Ones
B32 15
52 1
61
Tens Ones
B7 8
2 6
22
Tens Ones
B
B4 8
2 9
92
Tens Ones
B
184
2 1 1
13
Tens Ones
B 2 82 1
01
Tens Ones
B
1, 3, 4, 9, 5, 2, 8
II Chapter 6, Lesson 10Enrich
FL Benchmark
MA.2.A.2.2The Lost DigitsThese subtraction problems are missing some digits.
Can you put them back where they belong?
Write the correct digits in the boxes.1. 2. 3.
4. 5. 6.
Writing and Reasoning How did you choose which number to use in Exercise 6?
MXEFL11BWK2X_EN_C6.indd 53MXEFL11BWK2X_EN_C6.indd 53 7/14/09 4:38:58 PM7/14/09 4:38:58 PM
Enrich© Houghton Mifflin Harcourt Publishing Company
E54 Grade 2
Name II Chapter 6, Lesson 11Enrich
FL Benchmark
MA.2.A.2.2Add It Up – Take It AwayPierre wants to check his homework. His teacher explained that he could check an addition problem by using the same numbers in a subtraction problem.
Solve each addition problem. Then subtract to check.
Addition Subtraction Addition Subtraction
1. 2.
3. 4.
Writing and Reasoning How did you knowwhere to place each number from the addition problemin the subtraction problem?
1 1 4
+ 2 7
__
4 1
5 3
+ 3 6
__
3 4
+ 1 7
__
7 1
+ 1 9
__
-
__
5 3
4
3
/ 1
11 /
- 2 7
__
1 4
-
__
3 4
-
__
7 1
MXEFL11BWK2X_EN_C6.indd 54MXEFL11BWK2X_EN_C6.indd 54 7/14/09 2:30:02 PM7/14/09 2:30:02 PM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
E55
Name
FL Benchmark
MA.2.A.2.2
II Chapter 7, Lesson 1Enrich
Domino BreakEach set of dominos shows a 3-digit addend on top and another on the bottom. Break apart the addends. Solve and write the sum.
Writing and Reasoning Draw your own set of dominoes to show three-digit addition. Give it to a partner to solve.
1.
600 __ + 40 __ + 3 _
100 __ + 10 __ + 2 _
755 __
2.
__ + __ + _ __ + __ + _
__
3.
__ + __ + _ __ + __ + _
__
4.
__ + __ + _ __ + __ + _
__
5.
__ + __ + _ __ + __ + _
__
6.
__ + __ + _ __ + __ + _
__
MXEFL11BWK2X_EN_C7.indd 55MXEFL11BWK2X_EN_C7.indd 55 6/10/09 2:48:26 PM6/10/09 2:48:26 PM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E56
FL Benchmark
MA.2.A.2.2
II Chapter 7, Lesson 2Enrich
The Read-a-ThonFairview School had a summer read-a-thon.
Use the table. Add to fi nd the total number of pages read. Circle the grade that read the most.
Writing and Reasoning Write the grades in order from greatest number of pages read to least number of pages read.
Grade Homeroom #1 Homeroom #2 Total Pages Read
1 367 pages 332 pages __ pages
2 369 pages 417 pages __ pages
3 158 pages 601 pages __ pages
4 297 pages 422 pages __ pages
5 558 pages 145 pages __ pages
6 350 pages 351 pages __ pages
7 299 pages 301 pages __ pages
8 449 pages 241 pages __ pages
MXEFL11BWK2X_EN_C7.indd 56MXEFL11BWK2X_EN_C7.indd 56 6/10/09 1:53:54 PM6/10/09 1:53:54 PM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E57
200
+ 500
700
400
+ 300
700
400
+ 300
700
200
+ 500
700
FL Benchmark
MA.2.A.2.3
II Chapter 7, Lesson 3Enrich
The Nearest HundredWrite an original addition problem for each estimated problem. Give two possibilities.
Writing and Reasoning How did you decide which numbers to use?
1.
2.
3.
__
+ __
__
__
__
+ __
__
__
__
+ __
__
__
__
+ __
__
__
__
+ __
__
__
__
+ __
__
__
100
+ 200
300
100
+ 200
300
MXEFL11BWK2X_EN_C7.indd 57MXEFL11BWK2X_EN_C7.indd 57 6/10/09 3:26:01 PM6/10/09 3:26:01 PM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E58
+
TensHundreds Ones
+
TensHundreds Ones
+
TensHundreds Ones
+
TensHundreds Ones
1. 6, 5, 3, 1, 2, 4 2. 4, 4, 1, 3, 3, 9
3. 2, 1, 3, 7, 2, 4 4. 4, 3, 2, 2, 1, 6
Writing and Reasoning How did you make sure the ones would need to be regrouped?
II Chapter 7, Lesson 4Enrich
FL Benchmark
MA.2.A.2.23-Digit ScrambleUse each set of digits to make an addition problem that requires you to regroup the ones. Then solve.
MXEFL11AWK2X_EN_C7_V8.indd 58MXEFL11AWK2X_EN_C7_V8.indd 58 1/21/09 10:35:59 AM1/21/09 10:35:59 AM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E59
+ +
+ +
1 68
4 25
3 47
1 56
1 27
6 35
3 19
4 25
II Chapter 7, Lesson 5Enrich
FL Benchmark
MA.2.A.2.23 on 3 TournamentUse the numbers on the uniforms to make an addition problem. Write the sum.
1. 2.
3. 4.
Writing and Reasoning Create your own 3-digit addition problem with regrouping for a friend to solve.
MXEFL11BWK2X_EN_C7.indd 59MXEFL11BWK2X_EN_C7.indd 59 6/10/09 2:37:52 PM6/10/09 2:37:52 PM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E60
II Chapter 7, Lesson 6Enrich
FL Benchmark
MA.2.A.2.2Paint by RegroupingFind each sum. Use blue to circle the problems where you regrouped twice. Use green to circle the problems where you regrouped once. Use yellow to circle the problems with no regrouping.
1. 2. 3.
4. 5. 6.
7. 8. 9.
1 2 7 + 2 9 3
__
7 0 9 + 2 1 6
__
7 8 5 + 1 5 2
__
8 2 5 + 1 2 3
__
3 7 8 + 2 0 4
__
5 6 1 + 3 2 7
__
4 8 6 + 3 3 5
__
2 0 0 + 5 0 0
__
2 8 7 + 5 3 6
__
Writing and Reasoning Why do you sometimes need to regroup in 3-digit addition?
MXEFL11BWK2X_EN_C7.indd 60MXEFL11BWK2X_EN_C7.indd 60 6/10/09 2:44:56 PM6/10/09 2:44:56 PM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E61
359
717
464
225108
589
358
398
253
179500
469
II Chapter 7, Lesson 7Enrich
FL Benchmark
MA.2.A.2.2Addition Wheels
Nia wants to find two addends that have a sum of 717. She gives each addition wheel a spin. Which two numbers does Nia spin to reach a sum of 717?
__ and __
Which other two numbers can Nia spin to reach a sum of 717?
__ and __
Writing and Reasoning Write and solve two problems using numbers from the spinners to practice 3-digit addition.
MXEFL11AWK2X_EN_C7_V8.indd 61MXEFL11AWK2X_EN_C7_V8.indd 61 1/21/09 10:36:39 AM1/21/09 10:36:39 AM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E62
Find the MistakesCircle the mistake or mistakes in each problem.
Then write the correct numbers and solve.
1.
2.
3.
6 4 2 - 2 0 0
__
4 4 2
+ 2
__
444
6 4 2 - 2 9 8
__
344
9 1 2 - 3 9 9
__
9 1 2 - 4 0 0
__
5 1 2
+ 9
__
521
Writing and Reasoning How did the mistake in Exercise 2 make the answer wrong?
II Chapter 8, Lesson 1Enrich
FL Benchmark
MA.2.A.2.2
8 9 8 - 4 9 1
__
8 9 8 - 4 0 0
__
4 9 8
+ 9
__
507
MXEFL11BWK2X_EN_C8.indd 62MXEFL11BWK2X_EN_C8.indd 62 7/13/09 12:36:16 PM7/13/09 12:36:16 PM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E63
What’s the Difference?Use the information on the farmer’s list to write and solve each subtraction problem. Use manipulatives to help you.
1. How many more oranges than apples?
390 oranges
———
- 278 apples
————
112 — more oranges
2. How many more bananas than pears?
————
———
— more bananas
3. How many more roses than lilies?
———
————
— more roses
4. How many more daisies than violets?
————
————
— more daisies
Writing and Reasoning Use the list to write your own subtraction problem. Have a classmate solve it.
II Chapter 8, Lesson 2Enrich
FL Benchmark
MA.2.A.2.2
MXEFL11BWK2X_EN_C8.indd 63MXEFL11BWK2X_EN_C8.indd 63 6/15/09 11:46:25 PM6/15/09 11:46:25 PM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E64
II Chapter 8, Lesson 3Enrich
What Numbers Can You Use?Look at the numbers used to estimate differences. Write subtraction problems for which you could use these estimates.
1.300 300
- - 200 - - 200
100 100
2. 700 700
- - 300 - - 300
400 400
3. 800 800
- - 600 - - 600
200 200
Writing and Reasoning How did you choose numbers for Exercise 3? Explain.
FL Benchmark
MA.2.A.2.3
MXEFL11BWK2X_EN_C8.indd 64MXEFL11BWK2X_EN_C8.indd 64 7/14/09 4:32:05 PM7/14/09 4:32:05 PM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E65
II Chapter 8, Lesson 4Enrich
FL Benchmark
MA.2.A.2.2Subtraction StepsSolve each subtraction problem on the ladders to reach the top. Regroup tens if necessary.
B B
7 9 3 - 1 2 9
B B
8 8 5 - 2 2 8
B B
9 7 5 - 1 1 8
B B
6 6 4 - 2 1 7
B B
6 5 7 - 1 1 9
B B
8 5 7 - 3 1 9
B B
4 4 7 - 1 1 9
B B
5 3 8 - 2 1 9
B B
5 3 8 - 1 1 9
B B
3 2 8 - 1 0 9
B
B
3 1 9 - 1 1 9
B
B
4 1 9 - 1 0 9
Writing and Reasoning Create a subtraction problem of your own that requires regrouping tens.
MXEFL11BWK2X_EN_C8.indd 65MXEFL11BWK2X_EN_C8.indd 65 8/13/09 9:16:05 AM8/13/09 9:16:05 AM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E66
II Chapter 8, Lesson 5Enrich
Writing and Reasoning What relationship do you see between the subtraction and addition problems?
7 1
1 7
+ 2 5 8
__
9 7 5
+ 3 5 5
__
+ 3 4 6
__
+ 4 6 8
__
+ 2 7 0
__
+ 1 7 3
__
FL Benchmark
MA.2.A.2.2Check It OutSolve each subtraction problem. Then complete the addition problem to check your work.
1. 2.
3. 4.
5. 6.
8 4 9 - 3 5 5
__
6 2 7 - 3 4 6
__
7 9 3 - 4 6 8
__
5 4 6 - 1 7 3
__
4 3 8 - 2 7 0
__
9 7 6
/ 5 15 /
- 2 5 8
__
7 1 7
MXEFL11AWK2X_EN_C8_V9.indd 66MXEFL11AWK2X_EN_C8_V9.indd 66 1/21/09 10:39:07 AM1/21/09 10:39:07 AM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E67
-
-
- -
=
-
=310
718
246
189
246
371843
- =
=
=
=
=
=
-
-
FL Benchmark
MA.2.A.2.2
II Chapter 8, Lesson 6Enrich
Follow the Arrows to SubtractFollow the arrows and subtract along the way. Start in the top left corner and solve your way around.
Writing and Reasoning How is regrouping in subtraction different from regrouping in addition?
MXEFL11BWK2X_EN_C8.indd 67MXEFL11BWK2X_EN_C8.indd 67 6/15/09 11:46:37 PM6/15/09 11:46:37 PM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E68
FL Benchmark
MA.2.A.2.2
II Chapter 8, Lesson 7Enrich
Mystery NumberSubtract to fi nd each difference.
Color the box of each difference that has a 3 in the hundreds place to discover the mystery number.
Writing and Reasoning What is the mystery
number? —
When you regroup hundreds to subtract, what are you adding to the tens place?
4
0 7
- 2 5 9
__
9
0 1
- 5 3 9
__
7
0 2
- 3 5 5
__
7 0 4 - 3 5 2
__
8 0 9 - 3 7 9
__
5
0 8
- 1 1 9
__
4
0 2
- 1 7 4
__
8 0 8 - 4 3 7
__
9
0 2
- 5 3 8
__
6 0 9 - 2 6 9
__
3 0 3 - 1 1 1
__
5 0 8 - 1 8 3
__
MXEFL11BWK2X_EN_C8.indd 68MXEFL11BWK2X_EN_C8.indd 68 6/15/09 11:46:41 PM6/15/09 11:46:41 PM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E69
Compared to MeHave a classmate cut a piece of string to match your height. Compare the length of your string to each real object. Check the correct box with an X.
Find the object.Shorter than
my stringLonger than
my string
1.
2.
3.
4.
5.
Writing and Reasoning Find something else longer than your piece of string. Write a sentence to show what you found.
II Chapter 9, Lesson 1Enrich
FL Benchmark
MA.2.G.3.3
MXEFL11BWK2X_EN_C9.indd E69MXEFL11BWK2X_EN_C9.indd E69 6/6/09 12:20:55 PM6/6/09 12:20:55 PM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E70
eraser eraser eraser
Compare to Measure1. Lisa’s paintbrush is about 8 buttons long. A piece of
chalk is about 4 buttons long. About how many pieces of chalk long is the paintbrush?
about —
pieces of chalk
2. Jose’s picture frame is 2 pencils long. A pencil is about 3 erasers long. About how many erasers long is the picture frame?
about —
erasers
3. A party sandwich is 4 marker boxes long. Each box of markers is 2 stickers long. About how many stickers long is the sandwich?
about —
stickers
FL Benchmark
MA.2.G.3.3
II Chapter 9, Lesson 2Enrich
Writing and Reasoning If the eraser in Exercise 2 is 2 buttons long, about how many erasers long is the paintbrush?
MXEFL11BWK2X_EN_C9.indd E70MXEFL11BWK2X_EN_C9.indd E70 8/16/09 4:49:51 PM8/16/09 4:49:51 PM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E71
The Long and Short of ItUse each picture to estimate the length ofa classroom object. Draw and label the object below the picture.
1. The string is 2 inches long. Find an object that is about 3 inches long.
2. The crayon is 4 inches long. Find an object that is about 7 inches long.
3. The paperclip is 1 inch long. Find an object that is about 5 inches long.
II Chapter 9, Lesson 3Enrich
FL Benchmark
MA.2.G.3.1
Writing and Reasoning How did you use the pictures to estimate?
MXEFL11BWK2X_EN_C9.indd E71MXEFL11BWK2X_EN_C9.indd E71 7/9/09 1:41:51 PM7/9/09 1:41:51 PM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E72
about inchesabout inches
about inches
about inch
about inches
Measure the ToolsMeasure all of Carpenter Dan’s tools with your ruler. Write about how long each tool is below it. Circle the tools that are shorter than 5 inches.
II Chapter 9, Lesson 4Enrich
Writing and Reasoning Draw another tool that Carpenter Dan might have with him. Measure it and write the length.
FL Benchmark
MA.2.G.3.1
MXEFL11BWK2X_EN_C9.indd E72MXEFL11BWK2X_EN_C9.indd E72 6/6/09 12:21:03 PM6/6/09 12:21:03 PM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E73
MountFairlane
Newtown
Deerview
Sycamore
Crown Grove
Huntley
Sidell
Westville
Oak Hollow
Anson
Map MeasurementsUsing a ruler, measure from point to point on the map.
Write each distance to the nearest inch.
Writing and Reasoning Find the total distance following along the lines from Mount Fairlane to Anson and Deerview to Sidell. Which is greater? Explain.
II Chapter 9, Lesson 5Enrich
FL Benchmark
MA.2.G.3.1
MXEFL11AWK2X_EN_C9_V9.indd E73MXEFL11AWK2X_EN_C9_V9.indd E73 1/21/09 9:39:31 AM1/21/09 9:39:31 AM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E74
Handy MeasuringTrace the outline of your index fi nger. Measure your fi nger outline with an inch ruler and write down about how many inches long it is.
Estimate the lengths for the items below in fi ngers. Check your estimates by measuring with your fi nger and writing your answers in the second and third columns.
Object Estimate Actual
notebook —
fingers —
fingers about
— inches
pencil —
fingers —
fingers about —
inches
marker —
fingers —
fingers about —
inches
tape dispenser —
fingers —
fingers about —
inches
Writing and Reasoning Why would it be useful to be able to estimate measurements using your finger?
II Chapter 9, Lesson 6Enrich
FL Benchmark
MA.2.G.3.1
My finger is about —
inches long.
MXEFL11BWK2X_EN_C9.indd E74MXEFL11BWK2X_EN_C9.indd E74 6/6/09 12:21:07 PM6/6/09 12:21:07 PM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E75
II Chapter 9, Lesson 7Enrich
FL Benchmark
MA.2.G.3.2How Tall Are You?Work with a partner. Lie on the fl oor and ask your partner to place a piece of tape on the fl oor at the top of your head and at the bottom of your feet.
Measure to fi nd your height to the nearest inch. Then measure to fi nd your height to the nearest foot.
Write your measurements below.
I am —
inches tall.
I am about —
feet tall.
Writing and Reasoning Twenty-seven inches is the same as 2 feet 3 inches. What is your height in feet and inches?
MXEFL11BWK2X_EN_C9.indd E75MXEFL11BWK2X_EN_C9.indd E75 6/6/09 12:21:09 PM6/6/09 12:21:09 PM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E76
Length Riddles Find a real object to fi t the clues.
Measure the object. Remember to label your measurement with the unit you used (inches, feet, yards).
Then draw and label the object.
Find an object. Measure it. Draw it.
1. I am longer than 6 inches but shorter than one foot.
—
—
—
2. I am longer than one foot but shorter than one yard.
—
—
—
3. I am longer than one yard.
—
—
—
Writing and Reasoning Write a riddle for a partner to solve. Have your partner find an object, measure it, and draw it.
II Chapter 9, Lesson 8Enrich
FL Benchmark
MA.2.G.3.2
MXEFL11BWK2X_EN_C9.indd E76MXEFL11BWK2X_EN_C9.indd E76 6/6/09 12:21:11 PM6/6/09 12:21:11 PM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E77
Centimeter ClipsRead each problem. Write your measurement.
Use small paper clips to measure. Each small paper clip is about 3 centimeters long.
1. This is part of a toy train track.About how many centimeters long is it?
about —
centimeters
2. This caboose is from John’s collection.About how many centimeters long is it?
about —
centimeters
3. John needs to buy an engine for his train. About how many centimeters long is it?
about —
centimeters
Writing and Reasoning Find an object in your classroom that is about 5 small paper clips long. About how many centimeters long is it?
II Chapter 9, Lesson 9Enrich
FL Benchmark
MA.2.G.3.1
MXEFL11BWK2X_EN_C9.indd E77MXEFL11BWK2X_EN_C9.indd E77 6/6/09 12:21:12 PM6/6/09 12:21:12 PM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E78
Colorful VeggiesColor the vegetables that are 10 centimeters or longer yellow.
Color the vegetables that are shorter than 10 centimeters green.
II Chapter 9, Lesson 10Enrich
FL Benchmark
MA.2.G.3.1
Writing and Reasoning If you lined up all the same-color vegetables in two different rows, which row would be longer? Explain.
MXEFL11AWK2X_EN_C9_V9.indd E78MXEFL11AWK2X_EN_C9_V9.indd E78 1/21/09 9:40:28 AM1/21/09 9:40:28 AM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E79
Measure by Hand Make an estimate. Then measure real objects.
II Chapter 9, Lesson 11Enrich
FL Benchmark
MA.2.G.3.1
1. Use your to measure.
2. Use your to measure.
3. Use your to measure.
Estimate: —
fingers
Estimate: —
palms
Estimate: —
fingers
Actual: —
fingers
Actual: —
palms
Actual: —
fingers
Writing and Reasoning In Exercises 1–3, you used different parts of your hand as measurement units. Which unit was the best unit to use? Explain.
MXEFL11BWK2X_EN_C9.indd E79MXEFL11BWK2X_EN_C9.indd E79 6/6/09 12:21:18 PM6/6/09 12:21:18 PM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E80
Centi-Meter FeverFind real objects that fi t the clues.Measure each object. Use centimeters or meters for the units. Then draw and label it.
Find an object. Measure it. Draw and label it.
1. I am shorter than 10 centimeters.
—
—— —
2. I am longer than 50 centimeters but shorter than 1 meter.
—
—— —
3. I am longer than 1 meter.
—
—— —
Writing and Reasoning How much longer is the object in Exercise 2 than the object in Exercise 1? Explain.
II Chapter 9, Lesson 12Enrich
FL Benchmark
MA.2.G.3.2
MXEFL11BWK2X_EN_C9.indd E80MXEFL11BWK2X_EN_C9.indd E80 6/6/09 12:21:20 PM6/6/09 12:21:20 PM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E81
II Chapter 9, Lesson 13Enrich
Distance Drawings
1. Use a ruler to draw two different shapes. The total distance around each shape must be 12 centimeters. Label the length of each side.
2. Use a ruler to draw two different shapes. The total distance around each shape must be 16 centimeters. Label the length of each side.
FL Benchmark
MA.2.A.2.4
Writing and Reasoning Describe how you used the total distance given in Exercise 1 to decide how long the sides of each shape should be.
MXEFL11BWK2X_EN_C9.indd E81MXEFL11BWK2X_EN_C9.indd E81 6/6/09 12:21:21 PM6/6/09 12:21:21 PM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E82
inch ruleryardstickmeter stickstringcentimeter ruler
Measurement HikeHelp Benino and Rory take a few measurements on their hike. Draw lines to match each item to the tool that would work best to measure it. You may use a tool more than once, but be sure to use all of the tools.
II Chapter 9, Lesson 14Enrich
FL Benchmark
MA.2.G.3.4
Writing and Reasoning How did you decidewhich tools to match to the items being measured?
MXEFL11BWK2X_EN_C9.indd E82MXEFL11BWK2X_EN_C9.indd E82 7/9/09 1:38:52 PM7/9/09 1:38:52 PM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E83
FL Benchmark
MA.2.G.5.4
II Chapter 10, Lesson 1Enrich
item weight in ounces weight in pounds
1.strawberries
16 ounces 1 —
pound
2.squash
—
ounces 1 pound
3.apples
48 ounces —
pounds
4.carrots
32 ounces —
pounds
5.watermelon
—
ounces 5 pounds
Writing and Reasoning How many pounds of groceries do Celenia and her father buy in all? Write a number sentence below and solve.
Ounces and PoundsCelenia goes grocery shopping with her father. She wants to fi nd the weight of each item in ounces and in pounds. Help Celenia fi nd the weights.
MXEFL11AWK2X_EN_C10_V6.indd 83MXEFL11AWK2X_EN_C10_V6.indd 83 1/21/09 9:54:57 AM1/21/09 9:54:57 AM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E84
FL Benchmark
MA.2.G.5.4
grams kilograms
Item 1
object: —
mass: about —
grams
Item 1
object: —
mass: about —
kilograms
Item 2
object: —
mass: about —
grams
Item 2
object: —
mass: about —
kilograms
Writing and Reasoning How did you decide whether the object should be measured in grams or kilograms? Explain.
Measuring MassLook around the classroom.
Choose two objects to measure in grams.
Choose two objects to measure in kilograms.
Draw and label the objects. Then measure.
II Chapter 10, Lesson 2Enrich
MXEFL11BWK2X_EN_C10.indd 84MXEFL11BWK2X_EN_C10.indd 84 6/9/09 2:33:06 PM6/9/09 2:33:06 PM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E85
CranberryJuice CranberryJuice
Juice
Orange
Juice
Orange
Juice
Orange
Juice
Orange
GrapeJuice
GrapeJuice
GrapeJuice
GrapeJuice
GrapeJuice
GrapeJuice
PineappleJuice
PineappleJuice
FL Benchmark
MA.2.G.5.4
Writing and Reasoning How many total cups of juice does Aunt Nomary need to make her punch for the party?
— cups
How many gallons of juice are needed to make the punch? —
gallons
II Chapter 10, Lesson 3Enrich
How Many Cups of Juice?Aunt Nomary is making fruit punch for a party.
The recipe calls for different amounts of each juice below.
How many cups of each juice does Aunt Nomary need?
1.
1 quart apple juice = —
cups
2.
2 gallons cranberry juice = —
cups
3.
4 pints orange juice = —
cups
4.
2 quarts pineapple juice = —
cups
5.
6 pints grape juice = —
cups
MXEFL11BWK2X_EN_C10.indd 85MXEFL11BWK2X_EN_C10.indd 85 7/14/09 6:34:36 PM7/14/09 6:34:36 PM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E86
500 mL
1 liter
Z
YX
1 liter
W
V
500 mL
FL Benchmark
MA.2.G.5.4
Z = —
mL
Y = —
mL
X = —
mL
W = —
mL
V = —
mL
Writing and Reasoning If each beaker were filled to the top line, how many milliliters would they hold altogether? How many liters?
II Chapter 10, Lesson 4Enrich
Liter BeakersWrite the correct measurement for each mark on the liter beakers.
MXEFL11BWK2X_EN_C10.indd 86MXEFL11BWK2X_EN_C10.indd 86 6/11/09 5:29:38 PM6/11/09 5:29:38 PM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E87
FL Benchmark
MA.2.G.5.4
Writing and Reasoning Draw a figure to build with cubes. Trade drawings with a partner. Build the figure your partner drew with cubes. Write the volume.
II Chapter 10, Lesson 5Enrich
Volume of Irregular FiguresBuild the fi gure with cubes.
Write the volume.
1.
Volume: —
cubes
2.
Volume: —
cubes
3.
Volume: —
cubes
4.
Volume: —
cubes
MXEFL11BWK2X_EN_C10.indd 87MXEFL11BWK2X_EN_C10.indd 87 7/13/09 3:12:28 PM7/13/09 3:12:28 PM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E88
= =
?
?
?
Writing and Reasoning Draw a set of shapes that would balance 12 triangles.
II Chapter 10, Lesson 6Enrich
Balancing ShapesUse triangles to balance each pair of shapes.
Use the key as your guide.
KEY
1.
I would need 3 triangles —
to balance the shapes.
2.
I would need —
to balance the shapes.
FL Benchmark
MA.2.A.4.4
MXEFL11BWK2X_EN_C10.indd 88MXEFL11BWK2X_EN_C10.indd 88 6/9/09 2:33:16 PM6/9/09 2:33:16 PM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E89
masidesrtm
nbegtkuere
squaredcab
euahiwptpv
fstcablaee
yhhynianzr
emrlgcngot
caealaelie
oaesegdedx
sqcircleie
II Chapter 11, Lesson 1Enrich
FL Benchmark
MA.2.A.2.4
Writing and Reasoning What do you notice about the number of sides and vertices a geometric shape has?
Geometric Shapes PuzzleUse the clues to fi ll in the blanks.
Then fi nd the words in the puzzle below.
1. A c i r c l e has no straight sides.2. A s r e has 4 sides that are all the same length.3. A e c t n g l has 4 vertices.4. A t g l e has fewer than 4 vertices.5. A v t x is a point where 2 sides meet.6. A rectangle has 4 s s.
MXEFL11BWK2X_EN_C11.indd 89MXEFL11BWK2X_EN_C11.indd 89 6/17/09 12:02:19 PM6/17/09 12:02:19 PM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E90
Build Shapes in Two WaysUse pattern blocks. Find two different ways to make each shape. Draw lines inside the shapes to show your solutions.
1.
2.
3.
Writing and Reasoning What shape can you make using 4 squares? Name or draw the shape.
II Chapter 11, Lesson 2Enrich
FL Benchmark
MA.2.G.5.1
MXEFL11BWK2X_EN_C11.indd 90MXEFL11BWK2X_EN_C11.indd 90 6/17/09 11:17:27 AM6/17/09 11:17:27 AM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E91
Build ItUse pattern blocks or draw. Write the number of smaller shapes you use to make each larger shape.
1.
—
2.
—
3.
—
and —
4.
—
and —
II Chapter 11, Lesson 3Enrich
FL Benchmark
MA.2.G.5.1
Writing and Reasoning Look at Exercise 1. Draw another way to make this shape with more than one pattern block that is not a triangle.
MXEFL11BWK2X_EN_C11.indd 91MXEFL11BWK2X_EN_C11.indd 91 6/17/09 11:17:30 AM6/17/09 11:17:30 AM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E92
II Chapter 11, Lesson 4Enrich
FL Benchmark
MA.2.G.5.1Equal PartsCircle the shapes in each row that show the correct number of equal parts for each whole.
halves
thirds
fourths
Writing and Reasoning Write a problem about equal parts of a whole. Have a classmate solve it.
MXEFL11BWK2X_EN_C11.indd 92MXEFL11BWK2X_EN_C11.indd 92 6/17/09 11:20:27 AM6/17/09 11:20:27 AM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E93
II Chapter 11, Lesson 5Enrich
FL Benchmark
MA.2.A.4.3Pattern MatchMake a prediction about each pattern. Color to match each pattern unit with the correct pattern. Then complete the pattern to check your work.
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Writing and Reasoning Draw shapes to make your own pattern.
—
—
—
—
—
—
—
—
—
—
—
—
MXEFL11BWK2X_EN_C11.indd 93MXEFL11BWK2X_EN_C11.indd 93 6/17/09 11:17:36 AM6/17/09 11:17:36 AM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E94
red
yellow
orange
II Chapter 11, Lesson 6Enrich
FL Benchmark
MA.2.A.4.3Repeating Patterns Each pattern unit is made with 3 items. Extend each pattern. Then use the key to color the columns for each pattern.
Writing and Reasoning Draw your own pattern using the key.
MXEFL11BWK2X_EN_C11.indd 94MXEFL11BWK2X_EN_C11.indd 94 7/11/09 6:39:57 PM7/11/09 6:39:57 PM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E95
II Chapter 11, Lesson 7Enrich
FL Benchmark
MA.2.A.4.3Field DayThe parents are in charge of equipment for fi eld day. Each station needs equipment in a pattern.
Write the missing number in each pattern.
Draw each set of sports equipment that belongs in the pattern.
1 4 7 —
2 4 6 —
5 6 7 —
Writing and Reasoning Each station needs one more set. How many of each will be in the next set for each pattern?
—
—
—
MXEFL11BWK2X_EN_C11.indd 95MXEFL11BWK2X_EN_C11.indd 95 7/11/09 6:40:21 PM7/11/09 6:40:21 PM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E96
II Chapter 11, Lesson 8Enrich
FL Benchmark
MA.2.A.4.3Circle Pattern Mario wants to draw a pattern with circles. The number of circles changes by 3 from row to row. Draw the circles that could be in the fi rst four rows of Mario’s pattern.
1st row
2nd row
3rd row
4th row
Writing and Reasoning Draw the circles that should be in the 6th row of Mario’s pattern.
MXEFL11BWK2X_EN_C11.indd 96MXEFL11BWK2X_EN_C11.indd 96 6/17/09 11:18:09 AM6/17/09 11:18:09 AM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E97
PencilsMarkers
Erasers
1¢ each 5¢ each 10¢ each
II Chapter 12, Lesson 1Enrich
FL Benchmark
MA.2.G.5.3Find the Total ValueDraw two different sets of supplies for each pencil case. Be sure each case has at least 3 items. Use coins. Find the total value for the supplies in each pencil case.
Writing and Reasoning Can a set with 3 items cost more than a set with 4 items? Give an example.
Pencil Case 1
total value: —
¢
Pencil Case 2
total value: —
¢
MXEFL11BWK2X_EN_C12.indd 97MXEFL11BWK2X_EN_C12.indd 97 6/23/09 1:37:37 AM6/23/09 1:37:37 AM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E98
25¢ 1¢1¢1¢1¢25¢
1¢1¢1¢1¢
II Chapter 12, Lesson 2Enrich
FL Benchmark
MA.2.G.5.3What Is the Missing Coin?Draw and label the coins given.
Then draw the missing coin to fi nd the total value.
1. Jimmy has 2 quarters, 8 pennies, and another coin. He has 63¢ in all. What is the other coin?
missing coin
2. Tisha has 1 half dollar, 5 pennies, 1 nickel, and another coin. She has 70¢ in all. What is the other coin?
missing coin
3. Ed has 1 quarter, 2 nickels, and another coin. He has 85¢ in all. What is the other coin?
missing coin
Writing and Reasoning How did you find the missing coin in Exercise 3?
MXEFL11AWK2X_EN_C12_V7.indd 98MXEFL11AWK2X_EN_C12_V7.indd 98 1/21/09 9:51:01 AM1/21/09 9:51:01 AM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E99
50¢ 10¢ 5¢ 1¢25¢
II Chapter 12, Lesson 3Enrich
FL Benchmark
MA.2.G.5.3Arrange and Count CoinsCashier Rosita dropped her drawer of change. Help her arrange the coins from greatest value to least value. Draw each of the coins from the pile in the correct part of the drawer.
Then fi nd the total value of each type of coin.
Writing and Reasoning Does the greatest number of coins always have the greatest value? Explain.
total value: — ¢
total value: — ¢
total value: — ¢
total value: — ¢
total value: — ¢
50¢
MXEFL11BWK2X_EN_C12.indd 99MXEFL11BWK2X_EN_C12.indd 99 6/23/09 1:46:01 AM6/23/09 1:46:01 AM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E100
50¢
10¢
25¢
5¢
II Chapter 12, Lesson 4Enrich
FL Benchmark
MA.2.G.5.3Making Equal AmountsDraw coins of one kind to show the amount.
Writing and Reasoning Draw one more way to show 50¢ using different coins than the ones above.
MXEFL11BWK2X_EN_C12.indd 100MXEFL11BWK2X_EN_C12.indd 100 6/23/09 1:47:06 AM6/23/09 1:47:06 AM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E101
II Chapter 12, Lesson 5Enrich
FL Benchmark
MA.2.G.5.3Same Amount, Different WaysComplete the tables to show ways to make the same amounts with different coins.
Number of Coins
Quarters Dimes Nickels Total Value
4 3 0 1 80¢
9 0 7 2 80¢
Number of Coins
Quarters Dimes Nickels Total Value
3 40¢
4 40¢
8 40¢
Number of Coins
Quarters Dimes Nickels Total Value
4 45¢
5 45¢
6 45¢
Writing and Reasoning Is there a way to show 75¢ using only quarters and dimes? What about 40¢?
MXEFL11BWK2X_EN_C12.indd 101MXEFL11BWK2X_EN_C12.indd 101 6/17/09 9:08:54 AM6/17/09 9:08:54 AM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E102
nails wire paint brush
screw nut bolt
II Chapter 12, Lesson 6Enrich
FL Benchmark
MA.2.G.5.3Comparing at the Hardware StoreWrite the cost of each item. Write >, <, or = to compare the amounts.
1.
17¢ —
C < — C
—
2.
— C
— C
—
Writing and Reasoning Could Tim purchase a screw, nut, and bolt for less than 99 cents? Explain.
MXEFL11BWK2X_EN_C12.indd 102MXEFL11BWK2X_EN_C12.indd 102 6/17/09 9:09:57 AM6/17/09 9:09:57 AM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E103
$1.001. Ella has these coins.
2. Brad has these coins.
3. Matteo has these coins.
Make a DollarHow much more money does each child need to buy the yo-yo? Draw the coins to solve.
II Chapter 12, Lesson 7Enrich
FL Benchmark
MA.2.G.5.3
Writing and Reasoning Look at Exercise 3. Draw another set of coins that you could use to show your answer.
MXEFL11AWK2X_EN_C12_V7.indd 103MXEFL11AWK2X_EN_C12_V7.indd 103 1/21/09 9:52:09 AM1/21/09 9:52:09 AM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E104
$2.00
$20.00$35.00 $50.00
$8.00 $10.00
1. Carter has one $20 bill and two $10 bills. Does he have enough money to buy a bunny? yes no
2. Brianna has one $20 bill, one $10 bill, and two $5 bills. Does she have enough money to buy a bird?
yes no
3. Cam has one $10 bill and two $5 bills. Does he have enough money to buy a turtle? yes no
Is There Enough Money?Use the picture to solve. Circle yes or no.
II Chapter 12, Lesson 8Enrich
FL Benchmark
MA.2.G.5.3
Writing and Reasoning If you circled no for any exercises, tell how much more money you would need to make the purchase.
MXEFL11BWK2X_EN_C12.indd 104MXEFL11BWK2X_EN_C12.indd 104 6/18/09 9:06:49 AM6/18/09 9:06:49 AM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E105
FLORIDA FUNDS BANK
Account#: 123456
Date: January 19
Type of bill: $10
Number of bills: 10
Type of bill: $20
Number of bills:
Total Amount
FLORIDA FUNDS BANK
Account#: 123456
Date: January 26
FLORIDA FUNDS BANK FLORIDA FUNDS BANK
Total Amount $80
$40
Account#: 123456
Date: February 9
Type of bill: $20
Number of bills: 5
Total Amount
Account#: 123456
Date: February 2
Type of bill:
Number of bills: 8
Total Amount
Act It Out with BillsMs. Carson puts money in her bank account every week.
She fi lls out a deposit slip for each amount. Complete each slip. Use bills to act out each deposit.
II Chapter 12, Lesson 9Enrich
FL Benchmark
MA.2.A.6.1
Writing and Reasoning Ms. Carson withdrew $75. She received only one kind of bill. Which bills could she have received? How many of those bills have a total value of $75?
MXEFL11BWK2X_EN_C12.indd 105MXEFL11BWK2X_EN_C12.indd 105 6/18/09 7:03:39 AM6/18/09 7:03:39 AM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E106
891011 12
7 6 5432
1
891011 12
7 6 5432
1
12:00
6:00891011 12
7 6 5432
1
4:00891011 12
7 6 5432
1
7:00891011 12
7 6 5432
1
Matching the TimeMatch the clocks that show the same time.
II Chapter 12, Lesson 10Enrich
FL Benchmark
MA.2.G.5.2
Writing and Reasoning Draw to show the time you ate breakfast today.
1.
2.
3.
4.
MXEFL11BWK2X_EN_C12.indd 106MXEFL11BWK2X_EN_C12.indd 106 7/14/09 2:05:42 PM7/14/09 2:05:42 PM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E107
891011 12
7 6 5432
1
891011 12
7 6 5432
1
891011 12
7 6 5432
1
891011 12
7 6 5432
1
Telling Time at the ZooBobby and his father go to the zoo.Draw the hour hand on the clock to show what time they leave each part of the zoo.
II Chapter 12, Lesson 11Enrich
FL Benchmark
MA.2.G.5.2
Writing and Reasoning The hour hand shows the time that Bobby sat down for dinner. He finished dinner 1 hour later. What time did Bobby finish dinner?
1. They visit monkey island at half past 9:00. They leaveat 10:30.
2. They visit the lion exhibit at half past 10:00. They leaveat 11:30.
3. They visit the reptile house at half past 11:00. They leaveat 12:00.
MXEFL11BWK2X_EN_C12.indd 107MXEFL11BWK2X_EN_C12.indd 107 7/14/09 2:14:27 PM7/14/09 2:14:27 PM
Grade 2Enrich© Houghton Mifflin Harcourt Publishing Company
Name
E108
8
9
1011 12
7 6 54
3
21
8
9
1011 12
7 6 54
3
21
8
9
1011 12
7 6 54
3
21
8
9
1011 12
7 6 54
3
21
8
9
1011 12
7 6 54
3
21
8
9
1011 12
7 6 54
3
21
Make a Time ScheduleSeth is making a schedule of his school day. Fill in the times. Then draw the hands to show each time on the clocks below.
II Chapter 12, Lesson 12Enrich
FL Benchmark
MA.2.G.5.2
Writing and Reasoning Make a schedule for your school day on a separate sheet of paper.
Seth’s School Schedule
art 30 minutes after 8:00 8 : 30 —
science 30 minutes before 10:00 —
recess 30 minutes after 10:00 —
lunch 30 minutes before 12:30 —
reading 30 minutes before 1:00 —
math 30 minutes after 12:30 —
art science recess
lunch reading math
MXEFL11BWK2X_EN_C12.indd 108MXEFL11BWK2X_EN_C12.indd 108 6/17/09 9:30:18 AM6/17/09 9:30:18 AM