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(-47.65)*28/11+(-37.65)*(-28/11)+10.5*(-82/11) 简算 要过程.
人气:233 ℃ 时间:2019-11-08 16:51:43
解答
原式=(-47.65)*28/11+37.65*28/11)+10.5*(-82/11) =﹙﹣47.65+37.65﹚×28/11+10.5*(-82/11)=﹣280/11﹣11/2×82/11=-280/11-41=﹣731/11
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