简便计算 17.5*0.25+12.5/4
问题描述:
简便计算 17.5*0.25+12.5/4
答
0.25=1/4
17.5*0.25+12.5/4
=17.5*0.25+12.5*0.25
=0.25*(17.5+12.5)
=0.25*30=7.5
答
0.25*(17.5+12.5)=7.5
答
17.5*0.25+12.5/4
=¼×﹙17.5+12.5)
=¼×30
=7.5