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125乘以99加125简便

=125X(99+1) =125X100 =12500

1.25*99+1.25=1.25*99+1.25*1=1.25*(99+1)=1.25*100=125,第一个回答的真他么麻烦,求采纳

解:125*99+125*999-98*125=125*99-98*125+125*999=125+125*999=125x(1+999)=125x1000=125000

你好!简便算法是:(125X99+125)X16=[125X(99+1))]X16=[125X100]X16=12500X16=200000

125*99+125*64 =125*99+1*64 =12500*8*8 =800000

125*(100-1)=125*100-125*1=12375

125*99+125*(999-89)=125*(99+910)=125*1009=125*(1000+9)=125000+1125=126125

125X99X16+125X16 =125X8X2X99+125X8X2 =1000X2X99+1000X2 =2000X99+2000 =2000X(99+1) =2000X100 =200000

用乘法分配律:a*c+b*c=c*(a+b+1)=(125*16)*(99+1)=2000*100=200000

(125x99+125)x16=(125x99+125x1)x16=125x(99+1)x16=125x100x8x2=12500x8x2=100000x2=200000 祝学习进步.

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