422x101一422=422*(101-1)=422*100=42200
422X101-422用简便算解:采用分配律,原式=422x(101-1)=422x100=42200
422x101-422=42200125x32x25=100000
422x87+422x14-422x1 =422x(87+14-1)=422x100=42200
420x101一420=420x101一420*1=420x(101一1)=420*100=4200
422-101*422=422(1-101)=422*(-100)=-42200
=422X87+422X14-422X1=422X(87+14-1)=422X100=42200
420*101-420=420*(101-1)=420*100=42000
422x87+422x12+422=422x(87+12+1)=422x100=42200
用简便方法计算四年级76.2X101一76.276.2X101一76.2=76.2(101-1)=76.2*100=7620乘法分配律