7/12 - 2/9= 11/16-7/12= 7/12 +3/8= 7/9+11/15= 13/15-1/2= 6/7-3/11= 8/15+1/24= 9/16+7/12= 1/3+17/50= 3/8+1/12 надо

7/12 - 2/9=21/36 - 8/36=13/36
11/16-7/12=33/48 - 28/48=5/48
7/12 +3/8=14/24 + 9/24=23/24
7/9+11/15=35/45 + 33/45=68/45=1 целая 23/45
13/15-1/2=26/30 - 15/30=11/30
6/7-3/11=66/77 - 21/77=45/77
8/15+1/24=64/120 + 5/120=69/120=23/40
9/16+7/12=27/48 + 28/48=55/48=1 целая 7/48
1/3+17/50=50/150 + 51/150=101/150
3/8+1/12=9/24 + 2/24=11/24