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

125乘一百,再减去125

125x99 =125x100-125 =12500-125 =12375

19x99+19=19x(99+1)=19x100=1900; 125x88=125x8x11=1000x11=11000; 102x99=102x(100-1)=102x100-102=10200-102=10098; 382x101-382=382x(101-1)=38200

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

125*(99-91) =125*8 =1000

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

简便方法 125*99 + 1125 = 125*(100-1) + 1125 = 125*100 + ( -125*1 + 1125 ) = 12500 + 1000 = 13500 满意请采纳谢谢

=(125*16)*(99+1)=2000*100=200000

(125*99+125)*16=(99+1)*125*(8*2)=100*125*8*2=100*1000*2=200000