808乘以125的简便运算

问题描述:

808乘以125的简便运算

808*125
=101*8*125
=101*1000
=101000

808*125
=202*4*125
=202*500
=101000

808*125
=404*2*125
=404*250
=101000(比较难算)

808×125
=101×8×125
=101×1000
=101000

方法一:
808×125
=(800+8)×125
=800×125+8×125
=100000+1000
=101000
方法二:
808×125
=101×(8×125)
=101×1000
=101000

把808换成101×8,125×8=1000,这不就出来了么。
808×125
=101×8×125
=101×1000
=101000