0015 0016 Gr5 S C01L1HW 115024

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Number and Operations in Base Ten 5.NBT.2, 5.NBT.7

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Find 0.35 ? 100.

Lesson 6 Multiply Decimals by Powers of Ten

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One Way Multiply.

0.35 ? 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.

Another Way Move the decimal point. Multiplying a decimal by 100 moves the decimal point two places to the right.

0.35 35

So, 0.35 ? 100 = 35.

Practice

Multiply.

1. 0.13 ? 10 = 1.3

2. 1.4 ? 1,000 = 1,400

3. 4.81 ? 103 = 4,810

4. 0.72 ? 102 = 72

5. 0.179 ? 1,000 = 179

6. 67.2 ? 101 = 672

Copyright ? The McGraw-Hill Companies, Inc.

Lesson 6My Homework 415

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?

$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

Item Notebook Pencil Binder Pen

Price $1.25 $0.50 $2.15 $0.80

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

10.

3 Find the Error Rico is finding 7.5 ? 100.

Find and correct his mistake.

7.5 ? 100 07.5 = 0.075

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 B 15 centimeters

C 150 centimeters D 1,500 centimeters

416 Need more practice? Download Extra Practice at connectED.mcgraw-

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