Пошаговое объяснение:
3/8+7/8 = 10/8 = 1 2/8 = 1 1/4
5/12+2/3 = 5/12 + 10/12 = 15/12 = 1 3/12 = 1 1/4
3/4+4/5 = 15/20 + 16/20 = 31/20 = 1 11/20
4/15+17/20 = 16/60 + 51/60 = 67/60 = 1 7/60
15/12+11/18 = 45/36 + 22/36 = 67/36 = 1 31/36
Пошаговое объяснение:
3/8+7/8 = 10/8 = 1 2/8 = 1 1/4
5/12+2/3 = 5/12 + 10/12 = 15/12 = 1 3/12 = 1 1/4
3/4+4/5 = 15/20 + 16/20 = 31/20 = 1 11/20
4/15+17/20 = 16/60 + 51/60 = 67/60 = 1 7/60
15/12+11/18 = 45/36 + 22/36 = 67/36 = 1 31/36