Ответы на вопрос:
1) 1,2 - 1 7/15 = 1 2/10 - 1 7/15 = 1 1/5 - 1 7/15 = 1 3/15 - 1 7/15 = -4/15 2) -4/15 * (-5/8) = 1/6 3) 1 1/6 : 2 1/3 = 7/6 : 7/3 = 7/6 * 3/7 = 1/2 4) 1/6 - 1/2 = 1/6 - 3/6 = -2/6 = -1/3
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