12.3*8.5+36.9*0.5用简便方法计算
问题描述:
12.3*8.5+36.9*0.5用简便方法计算
答
12.3*8.5+36.9*0.5
=12.3*8.5+12.3*3*0.5
=12.3*(8.5+1.5)
=12.3*10
=123