Adding 1 (Easier)
Adding 2 (Harder)
Subtraction 1 (Easier)
Improper to Mixed
Mixed to Improper
100

1/2 +  1/2

2/2 or 1

100

1/2 +1/4

3/4

100

1/2 - 1/2

0

100

1  1/4

5/4

100

1  1/4

5/4

200

1/4 + 1/4

2/4

200

1/4 + 6/8

8/8 or 1

200

1 - 1/4

3/4

200

9/2

4  1/2

200

1 2/3

5/3

300

1/8 + 6/8

7/8

300

2/25 + 10/50

14/50

300

9/10 - 2/5

5/10

300

10/9

1  1/10

300

2 3/4

11/4

400

3/10 + 2/10

5/10 or 1/2

400

1/4 + 1/5

9/20

400

8/10 - 7/10

1/10

400

12/7

1  5/7

400

5 1/2

11/2

500

23/50 + 16/50

39/50

500

1/4 + 4/6

11/12

500

1/2 - 1/4

1/4

500

50/4

12  2/4   or 12 1/2

500

6 1/6

37/6