2.25*1.8+1.25*0.8简便计算
问题描述:
2.25*1.8+1.25*0.8简便计算
答
2.25*1.8+1.25*0.8
=2.25*(0.8+1)+1.25*0.8
=2.25*0.8+2.25*1+1.25*0.8
=1.8+2.25+1
=5.05