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所谓“化归”,就是转化和归结。在解决数学问题时,人们常常将待解决的问题甲,通过某种转化过程,归结为一个已经解决或者比较容易解决的问题乙,然后通过乙问题的解答返回去求得原问题甲的解答,这就是化归方法的基本思想。化归方法的要素:化归对象,即对什么东西进行化归;化归目标,即化归到何处去;化归途径,即如何进行化归。下举例说明如何在教学中应用这一思想。一、有关几何图形教学的应用
The so-called “return” is the transformation and sum up. In solving mathematical problems, people often solve the problem to be solved by a certain transformation process, boiled down to a problem has been solved or easier to solve B, and then return to solve the problem B through the original problem A solution, This is the basic idea of the return to the method. To return to the elements of the method: to return to the object, that is, what things to return; go to the goal, that where to go; to return to the way, that is, how to return. Give an example to illustrate how to apply this idea in teaching. First, the application of geometry teaching