Operations with Decimals (PreAlg Block 5 Review)

Place Value

200

In 9.81, what place is the 1 in?

Hundredths 

400

Convert .0406 to a mixed number

406/1,000

600

129.87946 What is the place value of the 6?

hundredth thousandths

800

Convert 1.203 to a mixed number

1 203/1,000

1000

In 93.4258, what place is the 8 in?

Ten Thousandths 

Multiplying/Dividing by Base 10

200

12.1 x 100

1,210

400

9,563 x 10 =

95,630

600

52.1 / 1,000 =

.00521

800

32.1 / 100

.321

1000

59.8 x 1,000 =

59,800

Adding Decimals

200

Add these decimals: 21.74 + 8.27

30.01

400

Add these decimals: 5.2 + 3.11

8.31

600

Add these decimals: 6.125 + 18.4729

24.5979

800

Add these decimals: 17 + 9.54

26.54

1000

Add these decimals: 4.67 + 29.1

33.77

Multiplying Decimals

200

Multiply these decimals: 0.2 * 7

1.4

400

Multiply 4.4 * 5.3 =

23.32

600

Multiply these decimals: 0.8 * 0.3

0.24

800

Multiply these decimals.  12.7 * 26 =

330.2

1000

Multiply these decimals. 0.25 * 0.7

0.175

Subtracting Decimals

200

Subtract these decimals: 851.701 - 312.49

539.211

400

Subtract these decimals: 10.71 - 0.7

10.01

600

Subtract these decimals: 547.612 - 3.107

544.505

800

Subtract these decimals: 9.034 - 0.095

8.939

1000

Subtract these decimals: 1.72 - 0.8

0.92