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vikaspektorenk
@vikaspektorenk
August 2021
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Выполните действия: а) 2/7+1/3-1/4; в)5/8-(1/4+1/3); г)2/5+3/11; д) 2/13-1/9
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sergeyC62972
Приводим к общему знаменателю:
а) 24/84 + 28/84 - 21/84 = 52/84 - 21/84 = 31/84
в) 5/8 - (1/4 + 1/3) = 15/24 - (6/24 + 8/24) = 15/24 - 14/24 = 1/24
г) 2/5 + 3/11 = 11/55 +15/55 = 26/55
д) 2/13 - 1/9 = 18/117 - 13/117 = 5/117
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Answers & Comments
а) 24/84 + 28/84 - 21/84 = 52/84 - 21/84 = 31/84
в) 5/8 - (1/4 + 1/3) = 15/24 - (6/24 + 8/24) = 15/24 - 14/24 = 1/24
г) 2/5 + 3/11 = 11/55 +15/55 = 26/55
д) 2/13 - 1/9 = 18/117 - 13/117 = 5/117