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数学
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7又24分之5乘上12,如何简便计算?
人气:261 ℃ 时间:2019-12-23 06:08:16
解答
( 7+ 5/24 ) X 12
= 7 X 12 + 12 X 5 / 24
= 84 + 5/2
= 84 + 2.5
= 86.5
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