Topic Emultiplying decimals

STANDARD - 5.NBT.2, 5.NBT.3, 5.NBT.7

Objective: Multiply a decimal fraction by single-digit whole numbers, including using estimation to confirm the placement of the decimal point.

Grade 5Module 1 Lesson 12

MATERIALS NEEDEDFOR THIS LESSON

Personal White Boards

Teacher

Student

Teacher Pages

Student Pages

Sprint A & BProblem SetExit TicketHomework

Fluency Practice (12 minutes)

1 minutesDo as many problems as you can.

Do your personal best. Take your mark!

Get set! THINK!

Add Decimals

SPRINT A

5.NBT.7 9 minutes

1 minutesDo as many problems as you can.

Do your personal best. Take your mark!

Get set! THINK!

Add Decimals

SPRINT B

5.NBT.7 9 minutes

Find the Product

5.NBT.7 3 minutes

4 x 2 =4 x 0.2 = 4 x 0.02 =

5 x 3 =5 x 0.3 = 5 x 0.03 =

3 x 2 =3 x 0.03 = 3 x 0.23 =2 x 0.14 =

Application Problem (8 minutes)

Patty buys 7 juice boxes a month for lunch. If one juice costs $2.79, how much money does Patty spend on juice each month? Use an area model to solve.

Concept Development (30 minutes)

Multipling Decimals

31 x 4 =3.1 x 4 =0.31 x 4 =

How are these problems alike?

Problem 1

31 x 4 =

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Problem 2

3.1 x 4 =

answ

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Problem 3

0.31 x 4 =

answ

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Problem 4

5.1 x 6 = 5 1 tenthx 6

answ

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Problem 5 11.4 x 4 =

1 1 4 tenthx 4

answ

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Problem 6 7.8 x 3 =

7 8 tenthx 3

21 24 2 3 4

answ

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Problem 7

3.12 x 4 = 12481.24812.48124.8

Problem 8

3.22 x 5 = 16101.61016.10161.0

Problem 9

3.42 x 6 = 2,0522.05220.52205.2

Problem 10

0.733 x 4 = reaso

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Problem 11

10.733 x 4 =

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4 0 28 12 12 4 2 9 3 2

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Problem 12

5.733 x 4 =

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20 28 12 12 2 2 9 3 2

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Problem Set (10 minutes)

Do Your Personal Best (Complete independently!)

Student Debrief (10 minutes)

How does the area model help you to justify the placement of the decimal point for the product in 1b?

How can whole number multiplication help you with decimal multiplication?

EXIT TICKET (3 minutes)

Complete the exit ticket and turn in...

HOMEWORK