Adding (Like)
Adding (Unlike)
Subtracting (Like)
Subtracting (Unlike)
Adding Mixed Number
100

1/2+2/2

3/2 or 1 1/2 

100

1/2 + 1/3

5/6

100

7/8 − 3/8

4/8 → 1/2

100

1/3 - 1/4 

1/12

100

4 7/8 + 1/8 

5

200

5/6 + 1/6

6/6 or 1

200

5/6 + 2/3 

9/6 or 1 3/6

200

5/6 − 2/6

3/6 → 1/2

200

5/6 - 5/12 

5/12

200

2 3/4 + 1/3

3 1/12 

300

7/10 + 2/10

8/10 or 4/5

300

5/6 + 1/12 

11/12

300

9/10 − 4/10

5/10 → 1/2

300

3/4 - 3/5 

3/20

300

2 4/5 + 3 1/2 

6 3/10

400

9/12 + 2/12

11/12

400

7/9 + 1/6

17/18

400

11/12 − 5/12

6/12 → 1/2

400

7/8 - 2/3 

5/24

400

4 5/8 + 2 2/3 

7 7/24

500

7/12 + 3/12

10/12 or 5/6

500

9/8 + 5/6 

47/24 or 1 23/24

500

6/9 − 1/9

5/9

500

5/6 - 3/8 

11/24

500

5 3/4 + 2 3/5 

8 7/20