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所谓常值代换,就是指用字母或含字母的代数式来替换常数,将数字问题转化为字母问题来解决。它是一种重要的解题技巧.利用常值代换解题常能收到减少计算量,提高解题速度的功效.兹举
The so-called constant substitution refers to the replacement of constants with letters or algebraic expressions containing letters to solve the problem of numbers by converting them into letters. It is an important problem-solving technique. The use of constant value substitution questions can often receive the effect of reducing the amount of calculation and improving the speed of problem solving.