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1.75×1.56-1.75+0.44×1.75的简便计算
人气:155 ℃ 时间:2019-10-26 14:35:35
解答
=1.75×1.56-1.75×1+1.75×0.44
=1.75×(1.56-1+0.44)
=1.75×1
=1.75
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