8и2/3-6и3/5-2и2/5+1и7/9
Решите задачу:
8 2/3 - 6 3/5 - 2 2/5 + 1 7/9 = (8 2/3 + 1 7/9) - (6 3/5 + 2 2/5) = (8 6/9 + 1 7/9) - 9 = 10 4/9 - 9 = 1 4/9