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讲清問題的关鍵和本貭为了使学生比較深刻地接受和掌握知識,一定要把教材中本貭的和关鍵性的問題讲清讲透。什么是教材的本貭和关鍵?怎样才能把它們讲清讲透?要根据具体教材做不同的处理。举两个例子来談一談。在数学归納法的教学中,为了让学生掌握这种論証方法的本貭,就要讲清楚两个推理步驟的实貭(特別是第二步)和它們之間的关系。論証的第一步(檢驗步驟),用一个或几个特殊的自然数驗証原命題的成立,学生比較容易理解。关鍵在于第二步(推証步驟),由n=k过渡到,n=k+1是比較抽象的。这里的k又存在又不存在。孤立地从第二步驟来
The key to clarify the problem and the 貭 貭 In order to enable students to more deeply accept and master knowledge, we must make clear the textbook and the key issues inherent. What is the main textbooks and the key? How can we tell them clearly? According to the specific materials to do different treatment. Give two examples to talk about. In the teaching of mathematical induction, in order for students to grasp the essence of this method of argumentation, it is necessary to make clear the reality of the two inference steps (especially the second step) and the relationship between them. The first step of the demonstration (test step), with one or a few special natural number to verify the establishment of the original proposition, the students easier to understand. The key lies in the second step (the corollary step), from n = k transition to, n = k +1 is more abstract. Here k exists and does not exist. Come from the second step in isolation