Пошаговое объяснение:
4 + 3 3/9 = 7 1/3
19 8/10-3 = 16 4/5
19 3/7 - 17 = 2 3/7
14 1/9 + 6 4/9 = 20 5/9
14 1/8 + 14 = 28 1/8
8 5/6 - 4 3/6 = 4 1/3
