简便计算:3.25x(7.4一0.86)
问题描述：
简便计算:3.25x(7.4一0.86)
答
原式=3.25×7.4-3.25×0.86
=24.05-4.11
=19.94
答
3.25x(7.4一0.86)
=6.5*(7.4一0.86)/2=6.5*(3.7-0.43)=6.5*3.27=21.255