Ответ: 29/55.
Пошаговое объяснение:
(20/55 + 28/55) - 19/55 = (20+28)/55 - 19/55 = 48/55 - 19/55 = 29/55.
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Ответ: 29/55.
Пошаговое объяснение:
(20/55 + 28/55) - 19/55 = (20+28)/55 - 19/55 = 48/55 - 19/55 = 29/55.