有一类选择题、填空题,看起来题目小,却蕴含的知识多、难度大、思想深、技巧强,因此逐渐成为近几年中考命题的热点.而由于这类题的标准答案一般都不需要解题过程,从而给解题者留下较大的空间,我们可以尽可能挖掘自己的智慧.本文展示一组代数求值问题的另解,以给读者一点启示. There is a class of multiple-choice questions, fill in the blank questions, the problem seems small, but contains a lot of knowledge, difficult, deep thinking, strong skills, and therefore gradually become a hot topic in recent years, the test center. We need to solve the problem so as to leave ample room for the problem-solver, and we can tap our own wisdom as much as possible.This paper presents a new solution to the problem of algebraic evaluation, which gives readers a little inspiration.