Adding rational numbers Adding/subtracting rational numbers

Subtracting decimals

100

1.1-1

.1

200

-2.1-5.6

-7.7

300

3.6-(-2.4)

6

400

56.147-(-63.2)

119.347

500

118-28.188

89.812

Adding decimals

100

1.1 + 8.9

10

200

50.25 + 25.75 

76

300

123.125 + 2.5

125.625

400

50.567 + 1.3486

51.9156

500

68.5689 + 3.413

71.9819

Adding fractions

100

1/2 + 1/2

1

200

1/4 + 1/4

1/2 or 2/4

300

1/2 + 1/12

7/12

400

1/5 + 2/4

14/20 or 7/10

500

5/12 + 1/2 + 5/20

70/60 or 1 10/60 or 1 1/6

Subtracting fractions

100

2/3-1/3

1/3

200

1/4-4/4

-3/4

300

1/12-1/2

- 5/12

400

7/5- (-6/7)

19/35

500

10/8-12/24

18/24 or 9/12 or 3/4