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25x125x5x68的简便计算

25x125x5x64 =25x125x5x4x8x2=(25x4)x(125x8)x(5x2)=100x1000x10=1000000

简便计算过程方法如下 解:25x125x4x8=(25*4)*(125*8)=100*1000=100000

25x125x50x64=25x25x5x50x64=25x4x25x4x50x4x5=100x100x50x20=10000x1000=10000000=10^7

25x125x5x64=(125x8)x(25x4)x(5x2)=1000x100x10=1000000

25x125x8x4=(25*4)*(125*8)=100*1000=100000 运用乘法交换律和乘法结合律

25X125=4x25X125/4=100x125/4=12500/4=3125.

25*8 * 125*2

25x125x25=(600+20+5)x125=600x125+20x125+5x125=75000+2500+625=78125

25X125X3X8=25X3X125X8=75X1000=75000

原式=(25x4)x(125x8)=100x1000=100000

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