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25x36x15简变计算

25*36*15=25*4*9*15=100*135=13500

25x36x125=(25x4)x(125*9)=100*1125=112500

25x36x9=25x4*(9x9)=100*81=8100

简便计算25x36x27=25x4x9x27=(25x4)x(9x27)=100x243=24300

24x15x25=4x6x15x25=4x25x6x15=100x90=9000

=25x4x36=100x36=3600(乘法结合律)

25x15x4x6=(25*4)*(15*6)=100*90=9000

4先乘25等于100再乘36

15x15x25=225*25=22500/4=5625

15*12*25(利用乘数拆解法来做)12=3*4 即原式=15*3*4*25 =45*100 =4500

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