a)=5/13
б)=11/21
в)=16/75
Пошаговое объяснение:
1. 3/13 + 7/13 - 5/13 = (3+7-5)/13 = 5/13
2. 5/21 + 15/21 - 9/21 = (5+15-9)/21 = 11/21
3. 23/75 + 34/75 - 41/75 = (23+34-41)/75 = (57-41)/75 = 16/75
a)=5/13
б)=11/21
в)=16/75
Пошаговое объяснение:
1. 3/13 + 7/13 - 5/13 = (3+7-5)/13 = 5/13
2. 5/21 + 15/21 - 9/21 = (5+15-9)/21 = 11/21
3. 23/75 + 34/75 - 41/75 = (23+34-41)/75 = (57-41)/75 = 16/75