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高中数学教科书常见的表示法主要有自然语言法、列举法、描述法及韦恩图法。在这四种方法中学生对描述法的理解常不到位。下面我们分别从这四个方面来探讨他们各自的应用。一、自然语言法用文字叙述的形式描述集合的方法,教材在编排过程中首先采用这类方法,但在使用此方法时要注意叙述清楚,如由所有正方形构成的集合,就是用自然语言表示的,不能叙述成“正方行”。二、列举法把集合的元素一一列举出来,并用“”括起来表示集合的方
Common high school mathematics textbooks are natural language law, enumeration, description and Wayne diagram method. Students’ understanding of the descriptive method is often not well placed in these four methods. Below we discuss their respective applications from these four aspects respectively. First, the natural language law to describe the form of text collection method, the textbook in the process of arranging the first use of such methods, but in the use of this method should pay attention to clear narration, as from all the squares constitute a collection is expressed in natural language Can not be described as “square line ”. Second, the enumeration method to enumerate the elements of the collection one by one, and use “” to enclose the square