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(343+685+157)-585

来源:学生作业帮 编辑:神马作文网作业帮 分类:数学作业 时间:2024/10/07 15:24:13
(343+685+157)-585
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怎么简便计算
(343+685+157)-585
(343+157)+(685-585)=500+100=600