分析和解答数学问题,通常有执因索果或者执果索因两种思维方法。前者是从条件出发,逐步推导出所需的结论 ,反映在解法上往往为综合法;后者则是从结论出发,逐步地追溯使结论成立的条件,反映在解法上就是分析法,也称之为逆推法。执因索果或者分析法,本来是中学里解决几何证明题常用的思路与方法,其实在小学数学问题解决中也是一种具有普遍意义的“通法”。传统的小学数学应用题教学中,审题之后分析数量关系时往往会教给学生这种 To analyze and solve math problems, there are usually two ways of thinking about executive search or fruit search. The former is based on the conditions, and gradually derive the required conclusions, reflected in the solution is often a comprehensive approach; the latter is from the conclusion, and gradually back the conditions for the conclusion of the conclusion is reflected in the solution is analytic, also known as The reverse method. Because of the result of the fruit or analysis, originally used to solve the geometric proof in secondary schools commonly used ideas and methods, in fact, the primary school mathematics problem solving is also a universal meaning “common law ”. Traditional primary school mathematics problem teaching, after examining the relationship between the number of often tend to teach students this