-2 + 1 целая 7/8 =(-1 целая 8/8) + (1 целая 7/8) = 8/8 + 7/8 = 15/8 = 1 целая 7/8
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-2 + 1 целая 7/8 =(-1 целая 8/8) + (1 целая 7/8) = 8/8 + 7/8 = 15/8 = 1 целая 7/8