=(123x125-123+125)-(125x123+125+123)
=2-(125+123)
=2-248
=-246
希望能帮你忙,懂了请采纳,对不起啊，我写错了（123×124+125）-（125×124-123）的简便计算怎么算=(123x125-123+125)-(125x123+125-123)=2-(125-123)=2-2=0