EXAMPLE 1 Multiplying Decimals

582

2.3862

5.82

0.41

2328

2 decimal places

+ 2 decimal places

4 decimal places

EXAMPLE 2

a. 6.45

5160

116.10

182 decimal places

2 decimal places

ANSWER

6.45 18 = 116.1Check: Because 6 20 = 120, the product is reasonable.

645

+ 0 decimal places

Multiplying Decimals

EXAMPLE 2

b. 1.2730.06

3 decimal places

5 decimal places

ANSWER

1.273 0.06 = 0.07638Check: Because 1 0.06 = 0.06, the product is reasonable.

+ 2 decimal places

0.07638

Multiplying Decimals

EXAMPLE 2GUIDED PRACTICE for Examples 1 and 2

Find the product. Then check that your answer is reasonable.

1. 1.4 7.2

10.08ANSWER

2. 0.98 0.21

0.2058ANSWER

3. 2.351 1.6

3.7616ANSWER

EXAMPLE 2GUIDED PRACTICE

4. 2.6 m

Evaluate the expression when m = 3.26 and n = 1.24.

8.476ANSWER

5. 1.7 n

2.108ANSWER

6. mn

4.0424ANSWER

for Examples 1 and 2