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Решение задачи #76851

Вычислить: 2 3/7 - 1 5/7; 3 5/9-1 8/9; 6- 2 2/3; 6 14/20-3 15/20; 9 10/12-8 11/12; 10 - 3 5/7

2 3/7 - 1 5/7 = 17/7 - 12/7 = 5/7

3 5/9 - 1 8/9 = 32/9 - 17/9 = 15/9 = 1 2/3

6 - 2 2/3 = 18/3 - 8/3 = 10/3 = 3 1/3

6 14/20 - 3 15/20 = 134/20 - 75/20 = 59/20 = 2 19/20

9 10/12 - 8 11/12 = 118/12 - 107/12 = 11/12

10 - 3 5/7 = 70/7 - 26/7 = 44/7 = 6 2/7