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August 2022
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Помогите пж очень срочно!!!!!!! Номер 1257 а, б
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LyubaAlexandorovna
А) преобразуем в неправильную дробь 17/15-23/10-7/6= приводим к общему знаменателю=(17*2-23*3-7*5)/30=-70/30=(:10)=-7/3=-2 1/3
б) 47/21-29/7+15/14=(47*2-29*6+15*3)/42=-35/42=(:7)=-5/6
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б) 47/21-29/7+15/14=(47*2-29*6+15*3)/42=-35/42=(:7)=-5/6