5x2.5*12.5*6.4简便运算
问题描述:
5x2.5*12.5*6.4简便运算
答
5x2.5*12.5*6.4
=(5*0.2)*(2.5*4)*(12.5*8)
=1*10*100
=1000
答
5*2.5*12.5*6.4
=5*2.5*12.5*2*4*0.8
=(5*2)*(2.5*4)*(12.5*0.8)
=10*10*10
=1000