Show:
Adding with Unlike Denominators
Subtracting with Unlike Denominators
Adding with Like Denominators
Subtracting with Like Denominators
Adding/Subtracting Mixed Numbers
100

1/2 + 1/3 =

5/6

100

1/2 - 1/3 =

1/6

100

4/9 + 3/9 =

7/9

100

6/8 - 5/8 =

1/8

100

1 3/4 + 3 1/8

4 28/32 or 4 7/8

200

2/6 + 1/5 =

16/30 or 8/15

200

2/6 - 1/5 =

4/30 or 2/15

200

10/15 + 5/15 =

15/15 or 1

200

13/9 - 4/9 =

9/9 or 1

200

3 2/6 + 2 1/3 =

5 12/18 or 5 2/23

300

5/9 + 1/4 =

29/36

300

5/9 - 1/4 =

11/36

300

9/18 + 3/18 =

12/18 or 2/3

300

15/20 - 9/20 =

6/20 or 3/10

300

5 3/6 - 2 1/6 =

3 2/6 or 3 1/3

400

3/8 + 2/3 =

25/24 or 1 1/24

400

6/8 - 2/3 =

2/24 or 1/12

400

8/12 + 5/12 =

13/12 or 1 1/12

400

6/3 - 2/3 =

4/3 or 1 1/3

400

5 3/4 - 5 3/8 =

12/32 or 3/8

500

5/7 + 6/8 =

82/56 or 1 26/56 or 1 13/28 

500

7/9 - 5/7 =

4/63

500

4/7 + 9/7 =

13/7 or 1 6/7

500

25/10 - 9/10 

16/10 or 1 6/10 or 1 3/5

500

7 9/10 + 5 1/10 =

13