1) 4 -7/12+1 5/6+2 1/3-1 14 2) 6 3/5-2 7/15+8 3/4-1 1/60

1. 1) 4 - 7/12 = 3 12/12 - 7/12 = 3 5/12
2) 3 5/12 + 1 5/6 = 3 5/12 + 1 10/12 = 4 15/12 = 5 3/12 
3) 5 3/12 + 2 1/3 = 5 3/12 + 2 4/12 = 7 7/12
4) 7 7/12 - 1 1/4 = 7 7/12 - 1 3/12 = 6 4/12 = 6 1/3
2. 1) 6 3/5 - 2 7/15 = 6 9/15 - 2 7/15 = 4 2/15
2) 4 2/15+ 8 3/4 = 4 8/60 + 8 45/60 = 12 53/60
3) 12 53/60 -1 1/60 = 11 52/60 = 11 13/15