Welcome to 1st Grade Math

In first grade, we are building a foundation for math.

To have a solid foundation, students need to have a good understanding of numbers.

They need to know what is 1 more, 1 less, 2 more, 2 less, 10 more, 10 less, what number bonds make up that number, what does this number look like on a ten-frame, etc.

Instead of covering many concepts an inch deep and a mile wide, we now cover less but in much more depth.

We Cover 4 Domains:

Operations and Algebraic Reasoning

Numbers in Base Ten

Geometry

Data and Measurement

Terms 1 and 2 focuses onOperations and Algebraic Reasoning

• Students will model strategies for adding and subtracting using objects and compare situations to understand the operations of addition and subtraction• Add to

• 2 + 3 = ?

• Take From• 5 – 2 = ?

• Put Together/Take Apart• 3 + ? = 5 and 5 – 3 = ?

Gone are the days of counting on our fingers or just telling students how

to solve addition and subtraction problems.

Video

Instead students will use games and manipulatives to explore, learn, develop and understand

strategies.

•Dice• Bears• Abacuses

•Unifix Cubes• Tape Diagrams• Ten-Frames

Strategies used for solving addition

Number Bonds 1-10

Commutative Property

Associative Property

+1

+2

Doubles

Doubles + 1

It takes a 10 to make a

teen

Inverse Relationships

Explain Explain Explain

I won’t be telling students how to solve a problem, instead, students will use games and manipulatives and explain how and what they did.

Through observation I can ask questions or make comments like:

I noticed you…How did you do that?

How do you know that?

Can you do it another way?

Did anyone do it a different way?

+ 0 1 2 3 4 5 6 7 8 9

0 0 1 2 3 4 5 6 7 8 9

1 1 2 3 4 5 6 7 8 9 10

2 2 3 4 5 6 7 8 9 10 11

3 3 4 5 6 7 8 9 10 11 12

4 4 5 6 7 8 9 10 11 12 13

5 5 6 7 8 9 10 11 12 13 14

6 6 7 8 9 10 11 12 13 14 15

7 7 8 9 10 11 12 13 14 15 16

8 8 9 10 11 12 13 14 15 16 17

9 9 10 11 12 13 14 15 16 17 18

Addition Chart

+ 0 1 2 3 4 5 6 7 8 9

0 0 1 2 3 4 5 6 7 8 9

1 1 2 3 4 5 6 7 8 9 10

2 2 3 4 5 6 7 8 9 10 11

3 3 4 5 6 7 8 9 10 11 12

4 4 5 6 7 8 9 10 11 12 13

5 5 6 7 8 9 10 11 12 13 14

6 6 7 8 9 10 11 12 13 14 15

7 7 8 9 10 11 12 13 14 15 16

8 8 9 10 11 12 13 14 15 16 17

9 9 10 11 12 13 14 15 16 17 18

Identity Property 0

+ 0 1 2 3 4 5 6 7 8 9

0 0 1 2 3 4 5 6 7 8 9

1 1 2 3 4 5 6 7 8 9 10

2 2 3 4 5 6 7 8 9 10 11

3 3 4 5 6 7 8 9 10 11 12

4 4 5 6 7 8 9 10 11 12 13

5 5 6 7 8 9 10 11 12 13 14

6 6 7 8 9 10 11 12 13 14 15

7 7 8 9 10 11 12 13 14 15 16

8 8 9 10 11 12 13 14 15 16 17

9 10 11 12 13 14 15 16 17 18 19

Adding 1 and 2

+ 0 1 2 3 4 5 6 7 8 9

0 0 1 2 3 4 5 6 7 8 9

1 1 2 3 4 5 6 7 8 9 10

2 2 3 4 5 6 7 8 9 10 11

3 3 4 5 6 7 8 9 10 11 12

4 4 5 6 7 8 9 10 11 12 13

5 5 6 7 8 9 10 11 12 13 14

6 6 7 8 9 10 11 12 13 14 15

7 7 8 9 10 11 12 13 14 15 16

8 8 9 10 11 12 13 14 15 16 17

9 9 10 11 12 13 14 15 16 17 18

Doubles

+ 0 1 2 3 4 5 6 7 8 9

0 0 1 2 3 4 5 6 7 8 9

1 1 2 3 4 5 6 7 8 9 10

2 2 3 4 5 6 7 8 9 10 11

3 3 4 5 6 7 8 9 10 11 12

4 4 5 6 7 8 9 10 11 12 13

5 5 6 7 8 9 10 11 12 13 14

6 6 7 8 9 10 11 12 13 14 15

7 7 8 9 10 11 12 13 14 15 16

8 8 9 10 11 12 13 14 15 16 17

9 9 10 11 12 13 14 15 16 17 18

Doubles +1

+ 0 1 2 3 4 5 6 7 8 9

0 0 1 2 3 4 5 6 7 8 9

1 1 2 3 4 5 6 7 8 9 10

2 2 3 4 5 6 7 8 9 10 11

3 3 4 5 6 7 8 9 10 11 12

4 4 5 6 7 8 9 10 11 12 13

5 5 6 7 8 9 10 11 12 13 14

6 6 7 8 9 10 11 12 13 14 15

7 7 8 9 10 11 12 13 14 15 16

8 8 9 10 11 12 13 14 15 16 17

9 9 10 11 12 13 14 15 16 17 18

Make a 10 facts

+ 0 1 2 3 4 5 6 7 8 9

0 0 1 2 3 4 5 6 7 8 9

1 1 2 3 4 5 6 7 8 9 10

2 2 3 4 5 6 7 8 9 10 11

3 3 4 5 6 7 8 9 10 11 12

4 4 5 6 7 8 9 10 11 12 13

5 5 6 7 8 9 10 11 12 13 14

6 6 7 8 9 10 11 12 13 14 15

7 7 8 9 10 11 12 13 14 15 16

8 8 9 10 11 12 13 14 15 16 17

9 9 10 11 12 13 14 15 16 17 18

In betweens make a double

+ 0 1 2 3 4 5 6 7 8 9

0 0 1 2 3 4 5 6 7 8 9

1 1 2 3 4 5 6 7 8 9 10

2 2 3 4 5 6 7 8 9 10 11

3 3 4 5 6 7 8 9 10 11 12

4 4 5 6 7 8 9 10 11 12 13

5 5 6 7 8 9 10 11 12 13 14

6 6 7 8 9 10 11 12 13 14 15

7 7 8 9 10 11 12 13 14 15 16

8 8 9 10 11 12 13 14 15 16 17

9 9 10 11 12 13 14 15 16 17 18

All Strategies Combined

The Power of Strategies

We’ve only discussed six ideas or strategiesadding 0adding 1 or 2doublesdoubles +1make a 10in-betweens

Yet these 6 strategies cover 94 of the 100 addition facts in the addition chart!

The remaining 6 facts are really only 3 facts and their turnarounds.

Word Problems or TasksWord problems will be used to get students thinking about which operations to use.

Key words “altogether” “in all” “left” should be avoided so students are left to come up with a strategy to solve the problem.

I went to visit Mrs. Fen’s farm last week.• On Monday, I found 1 egg.• On Tuesday, I found 2 eggs.• On Wednesday, I found 3 eggs.• On Thursday, I found 4 eggs.• On Friday, I found 5 eggs.

How many eggs did I find last week?

Students will then work together to solve the problem using whatever they want, pictures, manipulatives, or computations.

Terms 1 and 2 at a glance

• Week 1-Shapes

Understanding compose and decompose

Composing and decomposing shapes

Week 2-Exploring numbers 6, 7, 8 and 9

Finding all the combinations *

Understanding part/part/whole

Understanding anchor numbers 5 and 10 *

Subitizing cards *

Weeks 3 and 4-Exploring the Number 10

Finding all the combinations to 10

Number bonds

“+” and “=“

Data Day-comparing more and less

Weeks 5, 6, and 7-Exploring numbers 6, 7, 8, and 9 again

Number bonds

2 more/2 less

Understanding inverse relationship

Addition and subtraction are related

part/part/whole

Week 8-Number Line

Using a number lineAdding moves up the number lineSubtracting moves back

Counting onSay “5” count on to 10

Week 9-Teen Numbers

Develop a sense of numbers 11-20 Grouping tens and extras 10 and some ones

19 is 10 + 9 more

1 more/1 less 2 more/2 less

Term 2

Week 1-Doubles

Week 2-Doubles + 1Introduce adding 3 numbers

Comparing 4 + 5 with unifix cubes *Writing it as 4 + 4 + 1 = 9

Recognizing equations with doubles + 14 + 5 6 + 7 4 + 3

Week 3-Commutative Property

Does a total change if we switch the addends?

Song“Commutative property-when we’re adding switch

the addends it doesn’t matter the sum stays the same”

Dominoes

Week 4 and 5-inverse relationships

Week 4-numbers 1-6

Week 5- numbers 7-10

Knowing their number bonds is key to this strategy

To do subtraction-think addition7 – 3 = Think…. ? + 3 = 7

Week 6 and 8-Missing AddendsWriting Subtraction Problems

Understanding subtraction is taking a part away from the total

How to make an equation equal= means “the same” Is 4 = 5? What can be done to make 4 and 5 “the same”?

4 = 5 - 1

1 + 4 = 5

Solve for Missing AddendsGames to help

Bear Cave Game *

Guess your number *

Solving Word Problems with missing addends

Week 7-MeasurementOrdering and comparing objects

Shortest to LongestTallest to shortest

Nonstandard measuringPigsLadybugsOur feet

Accurate measuring

Week 9-Making 10’s Strategy

Strategy of how to make a 10 to find a solution for equations involving and 8 or 9.

8 + 6 = _______Take 2 from the 6 to make the 8 a ten then add the

4.

9 + 7 = _______Make the 9 a 10 by taking 1 from the 7 then add the

6.

**Important Note**Students will learn that the = sign can be found

at the beginning of the equation or at the end.____ = 5 + 5 or 5 + 5 = _____

Problems on their practice pages will be done both ways.

Questions????

Thank You so much for coming!!!