1)14 4/5 - 6 11/12 = 14 48/60 - 6 55/60 = 7 53/60
2)12 3/4 - 7 2/15 = 12 45/60 - 7 8/60 = 5 37/60
3)7 53/60 + 5 37/60 = 12 90/60 = 13 1/2
4)10 2/3 - 3 11/12 = 10 8/12 - 3 11/12 = 6 9/12 = 6 3/4
5) 13 1/2 : 6 3/4 = 27/2 * 4/27 = 2
6)2 2/3 * 3 3/4 = 8/3 * 15/4 = 10
7) 2 + 10 = 12