(3+5又8分之3+7.75)*(5.375+4又4分之3+2.6)-(4.75+5又8分之3)*(3+2又5分之3+5.375+7又4分之3)
问题描述:
(3+5又8分之3+7.75)*(5.375+4又4分之3+2.6)-(4.75+5又8分之3)*(3+2又5分之3+5.375+7又4分之3)
(3+5又8分之3+7.75)*(5.375+4又4分之3+2.6)-(4.75+5又8分之3)*(3+2又5分之3+5.375+7又4分之3)
要简便具体
答
7.75=7又4分之3
2.6=2又5分之3
5.375=5又8分之3
则原式=3*(5.375+4.75+2.6)+(5.375+7.75)*(5.375+4.75+2.6)
-3*(5.375+4.75) -(5.375+7.75)*(5.375+4.75+2.6)
=3*2.6
=7.8