Ответы на вопрос:
1) 1/5 - 1/6 = 6/30 - 5/30 = 1/30 2) 3/4 - 1/3 = 9/12 - 4/12 = 5/12 3) 7/9 - 2/11 = 77/99 - 18/99 = 59/99 4) 3/4 - 4/9 = 27/36 - 16/36 = 11/36 5) 7/8 - 5/12 = 21/24 - 10/24 = 11/24 6) 11/12 - 11/18 = 33/36 - 22/36 = 11/36
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