99.9乘11.2加15.6乘33.3加66.6乘25.4怎样巧算?急—————————
问题描述:
99.9乘11.2加15.6乘33.3加66.6乘25.4怎样巧算?急—————————
答
=33.3X(33.6+15.6+50.8)=33.3X100=3330
99.9乘11.2加15.6乘33.3加66.6乘25.4怎样巧算?急—————————
=33.3X(33.6+15.6+50.8)=33.3X100=3330