Пошаговое объяснение:
2 1/7 - (9/28 - 3/14) = 15/7 - 3/28 = 57/28 = 2 1/28
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Пошаговое объяснение:
2 1/7 - (9/28 - 3/14) = 15/7 - 3/28 = 57/28 = 2 1/28