Decimals

Place Value

200

In 9.81, what place is the 1 in?

Hundredths 

400

In 28.465, what place is the 5 in?

Thousandths 

600

129.8746 What is the value of the 9?

Ones

800

In 1.203 what place is 2 in?

Tenths 

1000

In 93.4258, what place is the 8 in

Ten Thousandths 

Multiplying by Powers of 10

200

12.1 x 100

1,210

400

9,563 x 10 =

95,630

600

52.1 x 1,000 =

52,100

800

0.321 x 100 =

32.1

1000

59.8 x 1,000 =

59,800

Adding Decimals

200

Add these decimals. 21.74 + 8.27

30.01

400

Add these decimals. 6.125 + 18

24.125

600

Add these decimals. 5.2 + 3.11

8.31

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: 0.03 x 10

.3

400

Multiply these decimals using an area model: 0.23 x 7

1.61

600

Multiply these decimals using an area model: 4.4 x 5.3

23.32

800

Multiply these decimals using an area model: 0.7 x 2.6 

1.82

1000

Multiply these decimals. 2.5 x 7

17.5

Subtracting Decimals.

200

Subtract these decimals.

3.53 - 2

1.53

400

Subtract these decimals.

10.71 - 0.7

10.01

600

Subtract these decimals.

2.54 - 1.82

0.72

800

Subtract these decimals.

2.15 - 1.05

1.1

1000

Subtract these decimals.

1.72 - 0.8

0.92