考试
2021-05-30 03:06:00

(1+1/2+1/3)×(1/2+1/3+1/4)-(1+1

题目描述

题目

(1+1/2+1/3)×(1/2+1/3+1/4)-(1+1/2+1/3+1/4)×(1/2+1/3)=(    )。
A:1/2
B:1/3
C:1/4
D:1/5

答案解析

本题考查常规计算。原式=(1+1/2+1/3)×(1/2+1/3)-(1+1/2+1/3)×(1/2+1/3)+(1+1/2+1/3)×(1/4)-(1/4)×(1/2+1/3)=1/4。
故本题答案为C选项。

答案:C

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