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求代数式的值是初中代数数学的重要内空,也是数学竞赛命题的热点之一.笔者通过近几年来的教学积累,总结了这类题在竞赛中常用的解题方法.
Seeking algebraic value is the junior high school algebra math important space, but also one of the hot topics in the mathematical contest proposition. Through the accumulation of teaching in recent years, I summarize the commonly used methods to solve these problems in the competition.