4 1/6 + 9 1/6 =
13 2/6 (13 1/3)
5 2/4 - 1 1/4
4 1/4
5 - 2/3
4 1/3
8 3/6 + 8 1/2
17 (16 6/6)
5 2/3 - 1 1/6
4 3/6 (4 1/2)