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同学们学习列方程解应用题遇到的一个主要困难,就是如何找出应用题中的相等关系、进而列出方程.本文拟就寻求应用题中的相等关系,提供一些操作(或分析)的方法,供同学们参考.一、根据题目中给出的条件和有关的数量关系找直接相等关系例1 一个水池、装有甲、乙两个进水管和一个排水管.空池时,单开甲管3小时可注满全池;单开乙管5小时可注满全池.满池时,单开排水管
One of the major difficulties encountered by students in studying equation solving applications is how to find out the equivalent relations in the application questions and then list the equations. This paper intends to seek the application of equal relations in the questions and provide some operations (or analysis) Method, for the students to refer to. First, according to the conditions given in the title and the number of relations to find a direct equal relationship Example 1 A pool, with A, B two inlet pipe and a drain. Empty pool, single open A tube can be filled in the whole pool for 3 hours; single open B tube can fill the whole pool for 5 hours. When the pool is full, the open drain tube