Math

Addition with like denominators

100

2/8 + 1/8

3/8

200

7/8 + 5/8

12/8

300

10/12 + 1/12

11/12

400

10/13 + 4/13

14/13

500

4/5 + 6/5

10/5

Subtraction with like denominators

100

3/4 - 2/4

1/4

200

3/5 - 1/5

2/5

300

3/7 - 2/7

1/7

400

5/6 - 3/6

2/6

500

5/10 - 4/10

1/10

Addition with unlike denominators

100

2/3 + 1/6

5/6

200

11/12 + 3/4

20/12

300

3/10 + 5/20

11/20

400

7/8 + 1/4

9/8

500

3/5 + 4/15

13/15

Subtraction with unlike denominators

100

3/10 - 5/20

1/20

200

2/3 - 1/6

3/6

300

3/5 - 4/15

5/15

400

11/12 - 3/4

2/12

500

7/8 - 1/4

5/8