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МатематикаВопрос:
4 1/21 - 1/7 =
Ответ:
4 1/21 - 1/7 = 85/21 - 1/7 = 85/21 - (1 * 3)/(7 * 3) = 85/21 - 3/21 = 82/21 = 3 19/21
Ответ: 3 19/21
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