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20012015
@20012015
July 2022
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г)4/5 * 2/3+2/3*2/5
д) 1 1/3 *5/14 - 1 1/3 *1/7
е) 12,9 *3/8 - 11,3 *3/8
Срочно! Тема: "Распределительное свойство умножения"
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enoilsantas
Г) 4/5 * 2/3 + 2/3 * 2/5 = 2/3 * (4/5 + 2/5) = 2/3 * 6/5 = 4/5
д) 1 1/3 * 5/14 - 1 1/3 * 1/7 = 1 1/3 * (5/14 - 1/7) = 1 1/3 * (5/14 - 2/14) = 1 1/2 * 3/14 = 4/3 * 3/14 = 2/7
е) 12,9 * 3/8 - 11,3 * 3/8 = 3/8 * (12,9 - 11,3) = 3/8 * 1,6 = 3/8 * 1 3/5 = 3/8 * 8/5 = 3/5
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Answers & Comments
д) 1 1/3 * 5/14 - 1 1/3 * 1/7 = 1 1/3 * (5/14 - 1/7) = 1 1/3 * (5/14 - 2/14) = 1 1/2 * 3/14 = 4/3 * 3/14 = 2/7
е) 12,9 * 3/8 - 11,3 * 3/8 = 3/8 * (12,9 - 11,3) = 3/8 * 1,6 = 3/8 * 1 3/5 = 3/8 * 8/5 = 3/5