3.8*4.5+38*0.55 简便运算
问题描述:
3.8*4.5+38*0.55 简便运算
答
3.8*4.5+38*0.55
=3.8*4.5+3.8*5.5
=3.8*(4.5+5.5)
=3.8*10
=38