0015 0016 Gr5 S C01L1HW 115024 - Weebly

Name

Number and Operations in Base Ten

5.NBT.2, 5.NBT.7

Lesson 6

Multiply Decimals

by Powers of Ten

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Find 0.35 ¡Á 100.

Another Way Move the decimal point.

One Way Multiply.

0.35

¡Á 100

000

0000

+ 3500

35.00

The non-zero digits are the

same. The decimal point in

the product moved two

places to the right.

Multiplying a decimal by 100 moves

the decimal point two places to

the right.

0.35

35

So, 0.35 ¡Á 100 = 35.

Practice

Copyright ? The McGraw-Hill Companies, Inc.

Multiply.

1. 0.13 ¡Á 10 =

1.3

2. 1.4 ¡Á 1,000 =

3. 4.81 ¡Á 103 =

4,810

4. 0.72 ¡Á 102 =

72

6. 67.2 ¡Á 101 =

672

5. 0.179 ¡Á 1,000 =

179

1,400

Lesson 6 My Homework415

Problem Solving

For Exercises 7 and 8, use the table which shows a

school store¡¯s prices.

7. How much would it cost to buy 10 pens from the

school store?

Item

Price

Notebook

Pencil

Binder

Pen

$1.25

$0.50

$2.15

$0.80

$8

8. How much will it cost for 10 pencils and one

notebook?

$6.25

9. The school purchased 100 trophies to give to the

honor roll students. If one trophy costs $4.32, how

much would it cost for all of the trophies?

$432

3

10.

Find the Error Rico is finding 7.5 ¡Á 100.

Find and correct his mistake.

Sample answer: He moved the decimal point to the left instead of

the right. The correct answer is 750.

Test Practice

11. Elyse is cutting strips of paper for a scrapbook page. Each strip is

1.5 centimeters wide. How wide will 10 strips of paper be?

A

1.5 centimeters

C

150 centimeters

B

15 centimeters

D

1,500 centimeters

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Copyright ? The McGraw-Hill Companies, Inc. Ingram Publishing/SuperStock

7.5 ¡Á 100

07.5 = 0.075

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