Ответ:
Пошаговое объяснение:
1) 1. 2/7 + 2. 3/4 = 1. 8/28 + 2. 21/28 = 3. 29/28 = 4. 1/28
2) 1. 9/14 + 11/28 = 1. 18/28 + 11/28 = 1. 29/28 = 2. 1/28
3) 4. 1/28 - 2. 1/28 = 2
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Ответ:
Пошаговое объяснение:
1) 1. 2/7 + 2. 3/4 = 1. 8/28 + 2. 21/28 = 3. 29/28 = 4. 1/28
2) 1. 9/14 + 11/28 = 1. 18/28 + 11/28 = 1. 29/28 = 2. 1/28
3) 4. 1/28 - 2. 1/28 = 2