125乘98简便方法计算=125x(100-2)=125x100-125x2=12500-250=12250
125x98=125x(100-2)=125x100-125x2=12500-250=12250
125×98=125×(100-2)=125×100-125×2=12500-250=12250
125×98=125×(100-2)=
125乘98简便方法计算