125X24X8X5
=25X5X24X8X5
=25X5X8X24X5
=25X40X24X5
=1000X120
=120000
首先,可以看出来125和8相乘得整数,24和5相乘得整数,所以整理一下,就是简便运算了
原式=125X8X24X5
=1000X24X5
=24000X5
=120000
125X24X8X5的简便运算
125X24X8X5
=125*8*24*5
=1000*100
=100000
=(125x8)x(24x5)
=1000x120=120000