Place Value
By 10, 100. 1000
Adding Decimals
Subtracting Decimals.
Add or Subtract
200

In 9.81, what place is the 8 in?

Tenths

200

0.8 x 100

80

200

Add these decimals. 21.74 + 8.27

30.01

200

Subtract these decimals.

3.53 - 2

1.53

200

2.45+ 7.9

10.35

400

In 28.465, what place is the 5 in?

Thousandths 

400

0.05 divided by 10

0.005

400

Add these decimals. 6.125 + 18

24.125

400

Subtract these decimals.

10.71 - 0.7

10.01

400

5.76- 4.32

1.44

600

129.879 What is the value of the 7?

7 hundredths

600
7 divided by 100

0.07

600

Add these decimals. 5.2 + 3.11

8.31

600

Subtract these decimals.

2.54 - 1.82

0.72

600

8.9+ 8.09

16.99

800

In 1.2437, what decimal place is worth 10 times LESS THAN the 4?

Thousandths 

800

2.17 X 1000

2170

800

Add these decimals. 17.809 + 9.54

27.359

800

Subtract these decimals.

32.05 - 17.29

14.76

800

6.91-4.28

2.63

1000

In 93.4258, what place is 100 times GREATER THAN the 2?

Ones.
1000

1.07 divided by 100

0.0107

1000

Add these decimals. 4.67 + 29.1

33.77

1000

Subtract these decimals.

60 - 35.72

24.28

1000

6- 4.09

1.91