Ответы на вопрос:
3 1/7 - (19/21 - 1/14) =2 13/42 1) 19/21 - 1/14 = 38/42 - 3/42 = 35/42 = 5/6 2) 3 1/7 - 5/6 = 22/7 - 5/6 = 132/42 - 35/42 = = 97/42 = 2 13/42 2 4/9 - (1 5/6 - 11/12) = 1 19/36 1) 1 5/6 - 11/12 = 11/6 - 11/12 = 22/12 - 11/12 = 11/12 2) 2 4/9 - 11/12 = 22/9 - 11/12 = 88/36 - 33/36 = = 55/36 = 1 19/36
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