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27x25x4简便计算脱式

解:原式=27x(25x4) =27x100 =2700

27X27X4=27X(25+2)X4=27X(25X4+2X4)==27X(100+8)==27X100+27X8=2700+216=2916

101x27-27x25x4=101x27-27x100=27x(101-100)=27x1=27,

25*4*28=100*28=28OO

25x11x4=100x11=1100

288+25x27x4脱式计算288+25x27x4=288+27*25*4=288+2700=2988

25*27*4=27*(25*4)=27*100=2700

解:27X25X40 =27X(25X40) =27X1000 =27000 满意请采纳.

脱式计算,即递等式计算,把计算过程完整写出来的运算,也就是脱离竖式的计算.不用竖式算25x11x4,那么你得知道25x4=100,且乘法是有交换律的,因此25x11x4=25x4x11=100x11=1100

27X25x4=27x100=2700125X23X8=125x8x23=1000x23=2300025X32x125=25x4x8x125=(25x4)x(8x125)=100x1000=100000

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