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5.34*23-534*1.3 简便脱式计算
人气:294 ℃ 时间:2020-06-04 00:41:05
解答
应该是5.34*23-53.4*1.3
=53.4*2.3-53.4*1.3
=53.4*(2.3-1.3)
=53.4*1
=53.4
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