简便计算28.9*61.5+111*6.15

题目

简便计算28.9*61.5+111*6.15

答案

28.9*61.5+111*6.15
=289x6.15x111x6.15
=(289+111)x6.15
=400x6.15
=400x6+400x0.15
=2400+60
=2460