简便计算88.8*1.2+2.22*52
问题描述:
简便计算88.8*1.2+2.22*52
答
88.8*1.2+2.22*52
=2.22*48+2.22*52
=2.22*(48+52)
=2.22*100
=22248从哪来的?88.8*1.2=2.22*40+1.2=2.22*48好像不是诶!40+1.2不是等于48!88.8*1.2=2.22*40*1.2=2.22*48