1/4 + 3/4 =
1
6/8 - 2/8
4/8 or 1/2
1/3 + 2/6 =
2/3 or 4/6
9/10 - 3/10
6/10 or 3/5
1/8 + 3/8 =
11/15 - 3/15
8/15
4/11 + 6/11 =
10/11
39/50 - 27/50
12/50
9/12 + 3/12
12/12 or 1
12/25 - 3/25
9/25