Пошаговое объяснение:
11/15-3/5 = 11/15 - 9/15 = 2/15
3/20+7/15 = 9/60 + 28/60 = 37/60
2/9+5/12 = 8/36 + 15/36 = 23/36
13/16-7/12 = 39/48 - 28/48 = 11/48
9/14-5/21 = 54/84 - 20/84 = 34/84 = 17/42
1)11/15-3/5=11/15-9/15 =2/15
2)3/20+7/15=9/60+28/60=37/60
3)2/9+5/12=8/36+15/36=23/36
4)13/16-7/12=39/48-28/48=11/48
5)9/14-5/21=27/42-10/42=17/42
Пошаговое объяснение:
