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用一元一次方程解有关年龄问题,是应用题中一个内容抽象的学习难点.对此,有的同学要么抓不住题目中特殊的隐含条件,要么不能正确理解各条件的内涵及外延,要么在众多的条件面前无从着手,导致解题思路紊乱.其实,若将题中的直接、间接条件系统地呈现出来,再分析揭示其内在联系,就能让同学们在整体认识、全面理解的基础上构建出解题思路.现举下题为例说明之.
Using the one-dimensional equation to solve the age problem is an abstract learning difficulty in the application. In this regard, some students either cannot grasp the special implicit conditions in the topic or they cannot correctly understand the connotation and extension of each condition. In the face of numerous conditions, there is no way to start, leading to confusion in the problem-solving ideas. In fact, if the direct and indirect conditions of the questions are systematically presented and then analyzed to reveal their internal connections, the students will be able to understand and understand the overall situation on the basis of the overall situation. On the construction of the problem-solving ideas. Now give an example to illustrate the problem.