Ответ:
Пошаговое объяснение:
1) 1 7/15 + 2 3/15 = 3 10/15
2) 3 10/15 - 1 8/15 = 2 2/15
3) 2 2/15 - 1 4/15 = 1 17/15 - 1 4/15 = 13/15
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1) 3 12/13 - 1 5/13 = 2 7/13
2) 2 7/13 - 1 9/13 = 1 20/13 - 1 9/13 = 11/13
3) 11/13 + 2 3/13 = 2 14/13 = 3 1/13
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1) 5 3/14 - 1 5/14 = 4 17/14 - 1 5/14 = 3 12/14
2) 3 12/14 + 2 9/14 = 5 21/14
3) 5 21/14 - 4 13/14 = 1 8/14 = 1 4/7