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999x8x4x5xl25x25x2

这题的简便方法是9x(4x25)x(2x5)=9x100x10=9000.这里面可以用到乘法的凑整法.这样的方法更便于口算.不容易出错.

=4*25*125*8*5*20*2=100*1000*100*2=20000000,请采纳,谢谢.

4X125X25X5X8X20X2 =125X8X(4X25)X(20X5)X2 =1000X100X100X2 =2000X10000 =20000000

25x8x4x5=(25x4)x(8x5)=100x40=4000

125x25x8x4x2x8=125x8x25x4x2x8=1000x100x16=1600000

125*8=1000,4*25=100;5*2=10; 答案是14000000

456x(2x5)x(125x8)x(25x4)=456x10x1000x100=456000000

125x14x4x8x25x5x2=(125x8)x(25x4)x(5x2x14)=1000x100x140=14000000

4x25x8x25的简算=(4*25)*(4*25)*2=100*100*2=20000

333x625x125x25x5x16x8x4x2的结果中末尾有10个零

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