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对题目进行分析,找出相等关系,是列方程解应用题的关键.有些简单的题目,经过审题或简单摘录,相等关系便呈现了.有些比较复杂的题目,需要进行分解并经过一番分析,才能找出相等关系;有些题目仅从现成的条件无法找出相等,需要通过挖掘隐含条件来寻找相等关系,尽管没有现成不变的公式可循,但有以下几种常用方法:一、译式法:将题中关键性的语言译成数学式子,进而找出相等关系.例1有甲、乙两个牧童,甲对乙说:“把你的羊给我1只,我的羊数就是你的羊数的2倍.”乙回答说:“最好还是把你的羊给我1只,我们的羊数就一样了.”
The analysis of the title to find the equal relationship is the key to the application of the column equation solution. Some simple topics, after a trial or a simple excerpt, the equal relationship will be presented. Some of the more complex topics that need to be decomposed and after some analysis , Some problems can not be found out from the ready-made conditions. Some problems need to be found by mining the implicit conditions. Although there are no unchangeable formulas to follow, there are several commonly used methods: First, Transliteration: the key words in the question will be translated into mathematical formulas, and then find the equal relationship.Example 1 has A, B two shepherd boys, A to B said: “Give your sheep to me, I The number of sheep is twice the number of your sheep. ”“ B replied: ”It is best to give your sheep to me, and our number of sheep is the same.“ ”