8 1/8+1 2/3-3 1/4 =8 3/24+1 16/24-3 6/24=6 13/24
6 1/4-2 5/7+6 3/14 =6 7/28-2 20/28+6 6/28=12 13/28-2 20/28=10-7/28=10-1/4=9 3/4
5 2/3+2 1/4-1 1/5 =5 40/60+2 15/60-1 12/60=6 43/60
8 7/10-5 3/4+6 1/5 =8 14/20-5 15/20+6 4/20=9 3/20
12 7/15-9 3/4+5 11/12=12 28/60-9 45/60+5 55/60=8 38/60=8 19/30