无敌从垂钓开始123，简便计算 1232124122 详解

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=123*123-（123+1）*122 =123*123-123*122-122 =123*（123-122）-122 =123-122 =1

简便计算 1232124122 详解

1232-124×122=1232-(123+1)×(123-1)=1232-1232+1=1

1232-122×124 =123^2-(123-1)(123+1)=123^2-(123^2-1)=1

1232122124

123*3-124*122=123*3-(123+1)(123-1)=123*3-123*123+1=123*(-120)+1=-14761

1232-124×122=1232-(123+1)×(123-1)=1232-1232+1=1

1233124122

246x24-123x38=123x48-123x38=123x（48-38）=123x10=1230

123×204 246×20-246ⅹ22简便计算=246×102+246×20-246ⅹ22=246×（102+20-22）=246×100=24600

369×886+342×123=369×886+342/3×369=369×886+114×369=369×(886+114)=369×1000=369000

你好！369*886+342*123=369*886+(114*3)*123=369*886+114*123*3=369*886+369*114=369(886+114)=369*1000=369000如有疑问，请追问。

123的平方-124×122 =123的平方-(123+1)×(123-1) =123^2-123^2+1 =1

1232-124×122=123*123-124*（123-1）=123*123-124*123+124=（123-124）*123+124=1

1232-124x122 =1232-(123+1)(123-1) =1232-(1232-1) =1

899x901+1 =(900-1)*(900+1)+1 =9002-12+1 =9002=810000 1232-124×122= =1232-(123+1)*(123-1) =1232-(1232-1) =1

899x901-1 =(900-1)(900+1)-1 =9002-1+1 =810000 1232-124x122 =1232-(123+1)(123-1) =1232-1232+1 =1

(900-1)×（900+1）+1 =9002-1+1 =810000