5.1 Review

Multiplying and Dividing by Powers of 10

100

What is 3 x 10?

30

200

What is 500 ÷ 100?

5

300

What is 23 x 10⁵

2,300,000

400

What is 7,800 ÷  10²

78

500

What is .45 x 1,000?

450

Multiplying Decimals and Dividing Decimals

100

2.6 x 2 =

5.2

200

6.4 ÷  8 =

.8

300

5.93 x 7 = 

41.51

400

22.4 ÷  2

11.2

500

59.32 ÷  4

9.88 R4

Adding and Subtracting Decimals

100

3 tenths + 2 tenths =

5 tenths

OR

.5

200

7 hundredths - 4 hundredths = 

3 hundredths

OR

.03

300

3.06 + .9 =

3.96

400

907.3 - 20 =

887.3

500

89 hundredths + 3 and 5 tenths 

4.39

Comparing Decimals

100

Which decimal is larger? 

.3 OR .9

.9

200

Which decimal is larger?

.56 OR .4

.56

300

Which decimal is larger?

.04 OR .004?

.04

400

Which decimal is larger?

1.5 or 12.4?

12.4

500

Which decimal is larger?

30.021 OR 4.98?

30.021

Rounding Decimals

100

Round the decimal to the nearest tenth

.58

.60

200

Round the decimal to the nearest tenth

2.45

2.50

300

Round the decimal to the nearest hundredth

.783

.780

400

Round the decimal to the nearest hundredth

4.268

4.270

500

Round the decimal to the nearest one

9.832

10