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初学列一元一次方程解应用题,常使许多同学对寻找题目中的相等关系感到困难。其实解决这一问题虽然不能找出一个可供直接套用的公式,但还是有一定的方法的。以下四种寻求相等关系的方法,供读者朋友在解题中参考。一、数量关系法数量关系法就是把题目中的数量以及数量之间的关系,用代数式的形式逐层表达出来,然后根据各代数式之间的内在联系,找出相等关系。如
The first-principle equations for first-principles equations are often used by beginners. Many students often find it difficult to find equal relationships in the subjects. In fact, to solve this problem, although we cannot find a formula that can be applied directly, there is still a certain way. The following four methods for seeking equivalence are available for readers to refer to. First, the quantitative relationship method The quantitative relationship method is to express the relationship between the quantity and the quantity in the title in algebraic form, and then to find out the equal relationship based on the internal connection between each algebraic formula. Such as