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vodoleichik0502
@vodoleichik0502
October 2021
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(1 ц. 8\21 - 19\42 - 3 ц. 5\28) * (-14\15)
по действиям
ц.-целых
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кляча
Verified answer
1) 1 8/21 - 19/42 = 29/21 - 19/42 = 58/42 - 19/42 = 39/42
2) 39/42 - 3 5/28 = 39/42 - 89/28 = 78/84 - 267/84 = - 189/84 = - 9/4
3) -9/4 * (- 14/15) = (9*14)/(4*15) = 21/10 = 2 1/10 = 2,1
------------------------------------------
3-е действие при умножении минуса на минус, в ответе получается плюс.
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Answers & Comments
Verified answer
1) 1 8/21 - 19/42 = 29/21 - 19/42 = 58/42 - 19/42 = 39/422) 39/42 - 3 5/28 = 39/42 - 89/28 = 78/84 - 267/84 = - 189/84 = - 9/4
3) -9/4 * (- 14/15) = (9*14)/(4*15) = 21/10 = 2 1/10 = 2,1
------------------------------------------
3-е действие при умножении минуса на минус, в ответе получается плюс.