1. выполните деление:
а) 5/6 : 2/3 б) 1 1/3 : 2 2/9

2. Решите уравнене:
2/3х = 4/7

3. Найдите значениев выражения:
(2/7+(1/2)2 + 3/4) : 1 1/7
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