(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
人气:327 ℃ 时间:2020-06-23 01:38:40
解答
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
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