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5.72×1.8+0.7×5.72-2.5×1.72简便计算
人气:161 ℃ 时间:2020-06-03 16:59:10
解答
5.72×1.8+0.7×5.72-2.5×1.72 =5.72*(1.8+0.7)-2.5*1.72 =5.72*2.5-2.5*1.72 =2.5*(5.72-1.72) =2.5*4 =10
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