来源:学生作业帮 编辑:大师作文网作业帮 分类:数学作业 时间:2024/11/12 10:48:07
(123×124+125)-(125×124+123)的简便计算怎么算
=(123x125-123+125)-(125x123+125+123)
=2-(125+123)
=2-248
=-246
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再问: 对不起啊,我写错了(123×124+125)-(125×124-123)的简便计算怎么算
再答: =(123x125-123+125)-(125x123+125-123) =2-(125-123) =2-2 =0