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列方程解应用题的关键是在透彻理解题意的基础上正确地列出方程,而列方程的关键又在于找出等量关系.它的实质是实现两个转化:把与方程有关的语言转译成方程;把未知数转化为已知数.常用的方法有以下三种.1.翻译法翻译法就是在正确分析题意的基础上,把题目固有的规律和特有的条件先译成用语言表示的等式,再用已知数(量)和未知数(量)列出代数式,从而得到要列的方程.例1某班到毕业时共结余班费1800元,班委会决定拿出不少于270元但不超过300元的资金
The key to the solution to the column equation solution is to correctly formulate the equation based on a thorough understanding of the problem, and the key of the column equation lies in finding the equivalence relation. Its essence is to realize two transformations: Translated into an equation; the unknown into a known number. Commonly used methods are the following three .1 Translation method is the translation of the correct analysis of the questions on the basis of the inherent rules of the subject and the unique conditions of the first translated into Language expression of the equation, and then the number of known (amount) and unknown (amount) algebraic formula, to be listed in the equation. Example 1 a class to a total of 1800 yuan when the class shift costs, the class decided to come up Not less than 270 but not more than 300 yuan of funds