23*2*4+25*4*2+27*1*8+25*8*1的简便计算法

问题描述:

23*2*4+25*4*2+27*1*8+25*8*1的简便计算法

23*2*4+25*4*2+27*1*8+25*8*1
=23*8+25*8+27*8+25*8
=8*(23+25+27+25)
=8*100
=800

(2*4)*(23+27+25+25)

=23*8+25*8+27*8+25*8
=(23+25+27+25)*8
=100*8
=800

8*(23+25+27+25)=800

23*2*4+25*4*2+27*1*8+25*8*1
=23*8+25*8+27*8+25*8
=(23+25+27+25)*8
=100*8
=800

2*4*(23+25+27+25)=8*100=800