4/8 + 2/8 + 7/8 =
15/4 + 13/4 - 8/4 =
8/4 - 4/4 =
2/5 + 7/5 =
2/3 + 4/3 =
7/2 - 3/2 -1/2
4/15 + 12/15 - 5/15 =
16/3 + 12/3 - 15/3 + 1/3 - 2/3 =
2
3/2
9/5
11/15
4
13/8
5
1
