Ответы на вопрос:
А)5 2/3 : 1/3-1 7/12*6 = 17/3: 1/3 - 19/12*6 = 17 - 19/2 = 17-9 1/2 = 7 1/2б)4 3/7: 1/7-1 5/6*3 = 31/7: 1/7 - 11/6*3= 31 - 11/2 = 31 - 5 1/5 = 4 1/2в)2 1/10: 1 2/5= 21/10: 7/5= 15/2 = 7 1/2
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