Пошаговое объяснение:
17/36+5/18 = 17/36 + 10/36 = 27/36 = 3/4
7/23+3/46 = 14/46 + 3/46 = 17/46
19/65+4/13 = 19/65 + 20/65 = 39/65
9/88+3/11 = 9/88 + 24/88 = 33/88 = 3/8
5/17+2/51 = 15/51 + 2/51 = 17/51 = 1/3
4/5-5/8 = 32/40 - 25/40 = 7/40
