Ответ:
Пошаговое объяснение:
1) 3 - 1 20/21 = 1 1/21. 2) 22/21 : 4/49 = 77/6 = 12 5/6. 3) 13 - 12 5/6 = 1/6. 4) 1/6 + 3/10 = 5/30 + 9/30 = 14/30 = 7/15
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Ответ:
Пошаговое объяснение:
1) 3 - 1 20/21 = 1 1/21. 2) 22/21 : 4/49 = 77/6 = 12 5/6. 3) 13 - 12 5/6 = 1/6. 4) 1/6 + 3/10 = 5/30 + 9/30 = 14/30 = 7/15