Adding and Subtracting Fractions

Adding Like Denominators

100

1/6 + 3/6 =? 

4/6

200

2/12 + 9/12 = ?

11/12

300

10/15 + 4/15 =? 

14/15

400

25/50 + 25/50 =?

50/50 or 1

500

 57/100 + 23/100 =?

80/100

Subtracting Like Denominators

100

5/6 - 2/6 =? 

3/6

200

9/10- 2/10 =?

7/10

300

18/20 - 11/20 =?

7/11

400

23/25 - 11/25 =?

12/25

500

88/100 - 51/100 =?

37/100

Adding Unlike Denominators

100

1/3 + 1/4 =?

7/12

200

2/6 + 3/8 =?

17/24

300

3/10 + 2/5 =?

7/10

400

7/100 + 2/25 =?

15/100

500

3/7 + 5/49 =?

26/49

Subtracting Unlike Denominators

100

2/3 - 1/4 =?

5/12

200

3/5 - 1/2 =?

1/10 

300

12/14 - 1/7 =? 

10/14

400

16/100 - 2/50 =?

12/100

500

99/100 - 20/25 =?

40/100