代数式的求值问题是初中数学竞赛的常见题型,它知识覆盖面广,解法灵活多变,蕴含着不少的技能技巧.本人现根据题目的特点,归纳如下一些解法,也许会对同学们在解类似题时有所帮助或启发. Algebraic evaluation is a common problem in the junior high school math competition. It covers a wide range of knowledge, the solution is flexible and contains a lot of skills and skills. I now sum up the following solutions according to the characteristics of the topic, maybe the students will be Solve similar questions helpful or inspiring.