Unit 6 Multiplying Decimals Review

Vocabulary

100

A numner close to an exact value.

Estimate

200

A number that has one of more digits ot the right of the decimal point. 

Decimal

300

To break into different parts

decompose

400

The answer when multiplying.

Product

500

The answer when subtracting.

Difference

Power of 10

100

3.6 x 10² =

360

200

7.2 x 10³ =

7,200

300

1.2 x 100 =

120

400

1.9 x 10⁴ =

19,000

500

3.5 x 1,000 =

3,500

Estimate Products

100

Estimate:

4.18 x 6.86 =

4 x 7 = 28

200

Estimate:

3.6 x 9.8 =

4 x 10 = 40

300

Estimate:

6.7 x 9.8 =

7 x 10 = 70

400

Estimate by finding the RANGE:

4.93 x 7.88 =

4 x 7 = 28

5 x 8 = 40

500

Estimate by finding the RANGE:

16.12 x 3.55 =

16 x 3 = 48

Generalizations

100

3.8 is ____ of 38

1/10

200

0.45 is _____ of 45

1/100

300

45 x 17 = 765

45 x 1.7 = 

76.5

400

16 x 89 = 1,424

16 x 0.89 =

14.24

500

82 x 67 = 5,494

82 x 6.7 = 

549.4

Multiply Decimal #'s

100

0.9 x 0.4 =

0.36

200

0.5 x 0.7 =

0.35

300

5 x 0.8 =

4.0 or 4

400

6.7 x 0.5 =

3.35

500

3.6 x 4.7 =

16.92