Ответ:
3/4 - 1/4 = 2/4 = 1/2
5/8 + 3/8 = 8/8 = 1
7/12 - 5/12 = 2/12 = 1/6
8/15 + 2/15 = 10/15 = 2/3
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Ответ:
3/4 - 1/4 = 2/4 = 1/2
5/8 + 3/8 = 8/8 = 1
7/12 - 5/12 = 2/12 = 1/6
8/15 + 2/15 = 10/15 = 2/3