(123×124+125)-(125×124+123)的简便计算怎么算

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/16 10:45:04
(123×124+125)-(125×124+123)的简便计算怎么算
xSN@0~!aID@*b,LX"" ~wZVg:-n{9R,f]ٹ.a9)k#PBmϙctmC'eie~)p=i"1 7X%^#uF5}Y;Ej'֤Z͞qq'Pf0 f~'LH&xB uc!(K y菭ѕ6օk~ ٦MsKYoQf/7iӅM+A Ot:Ѹ8\qSCë#v 㱞f M^%N"ѽ

(123×124+125)-(125×124+123)的简便计算怎么算
(123×124+125)-(125×124+123)的简便计算怎么算

(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
希望能帮你忙,懂了请采纳,

(123×124+125)-(125×124+123)
=123×124+125-125×124-123
=(123×124-125×124)+(125-123)
=124×(123-125)+2
=124×(-2)+2
=-248+2
=-246对不起啊,我写错了是(123×124+125)-(125×124-123)的简便计算怎么算(123×12...

全部展开

(123×124+125)-(125×124+123)
=123×124+125-125×124-123
=(123×124-125×124)+(125-123)
=124×(123-125)+2
=124×(-2)+2
=-248+2
=-246

收起

直接去括号就行了
(123×124+125)-(125×124+123)
=123×124-125×124+2
=124×(123-125)+2
=-248+2
=-246

原式=123*124+125-125*124-123
=123*(124-1)+125*(1-124)
=123*123-125*123
=123*(123-125)
=123*(-2)
=-246