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125x25x23的简便计算

解:125x25x23=125x5x5x23=(125x5)x(5x23)=625x115=625x(100+10+5)=625x100+625x10+625x5=62500+6250+3125=71875

125x25x16=125*25*4*4=125*4+25*4=600*100=60000

125x25x33=125X[25X(32+1)] =125X[25X4X8+25] =125X[800+25] =125X800+[(00+25)X25] =100000+2500+625 =103125

简便运算125X25X32=(125*8)X(25*4)=1000X100=100000

125*25*3=125*(3*8+1)*3=(125*8*3+125*1)*3=3000*3+125*3=9000+375=9375

125X25x30简便运算=125x750=125x800-125x50=100000-6250=193750

125x25x48=(125x8)x(25x4)=1000x100=100000

125x25x96=125x25x(8x4x3)=(125x8)x(25x4)x3=1000x100x3=300000

125X23-25-23 此题没有简便方法=2875-25-23=2827

解: 64X125X25X5 =8X8X125X25X5 =(8X125)X(8X5X25) =1000X1000 =1000000

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