Ответ:
Пошаговое объяснение:
1) 7/15 + 3/10 = 14/30 + 9/30 = 23/30
2) 23/30 * 2 14/23 = 23/30 * 60/23 = 60/30 = 2
3) 30/57 - 3/19 = 30/57 - 9/57 = 21/57
4) 1 6/57 : 21/57 = 63/57 * 57/21 = 63/21 = 3
5) 2 + 3 = 5
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Ответ:
Пошаговое объяснение:
1) 7/15 + 3/10 = 14/30 + 9/30 = 23/30
2) 23/30 * 2 14/23 = 23/30 * 60/23 = 60/30 = 2
3) 30/57 - 3/19 = 30/57 - 9/57 = 21/57
4) 1 6/57 : 21/57 = 63/57 * 57/21 = 63/21 = 3
5) 2 + 3 = 5