Adding and Subtracting Fractions

Subtracting Like Denominators

100

7/10-5/10

2/10

200

3/8-2/8

1/8

300

9/16-7/16

2/16

400

34/40-18/40

16/40

500

54/70-29/70

25/70

Adding Like Denominators

100

5/9+2/9

7/9

200

12/20+7/20

19/20

300

25/60+14/60

39/60

400

45/80+19/80

64/80

500

73/100+15/100

88/100

Subtracting Unlike Denominators

100

5/8-2/4

1/8

200

5/12-2/6

1/12

300

10/5-2/5

4/15

400

7/8-4/6

6/24

500

7/9-3/4

1/36

Adding Unlike Denominators

100

2/5+1/3

11/15

200

5/20+3/5

14/20

300

13/18-1/6

10/18

400

4/5-2/3

2/15

500

2/3-2/7

8/21

Bonus

100

7/9-5/9

4/9

200

10/25+15/25

25/25 or 1 Whole

300

5/12+2/6

1/12

400

4/16+2/4

12/16

500

2/3-1/4

5/12