Ответ:
3/7 + 5/8 = 24/56 + 35/56 = 59/56 = 1 3/56
11/12 - 7/8 = 22/24 - 21/24 = 1/24
20/21 - 5/9 = 20/21 - 15/21 = 5/21
Пошаговое объяснение:
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Ответ:
3/7 + 5/8 = 24/56 + 35/56 = 59/56 = 1 3/56
11/12 - 7/8 = 22/24 - 21/24 = 1/24
20/21 - 5/9 = 20/21 - 15/21 = 5/21
Пошаговое объяснение: