集合符号识记偶得

• 作 者: 何国卿
• 出 处: 湖南教育
• 发表日期: 2004年期
• 关键词: 近代数学 全国统编 真子集 识别能力 王整 包含关系 实数集 开口方向 整数集 不等于

全国统编高中数学第一册,引入了近代数学中最基础的集合概念,并出现了不少有关集合的符号,如属于∈,不属于,真包含于,真包含,包含于.包含等等,学生在识记这些符号时,往往打混出错。因此,教给他们一些识记的方法是很有益的。1.借助符号的形声进行联想识记。比如“属于∈”这个符号,由于“属”(shǚ)和“梳”(shǖ)的读音相近,符号∈的形状象一把“梳

The national high school mathematics compiled the first volume, the introduction of the most basic concepts in modern mathematics, and the emergence of a number of symbols related to the collection, if belongs to ∈, does not belong to, really included, really contains, included in. Inclusion, etc. When students mark these symbols, they often make mistakes. Therefore, it is helpful to teach them some way of memorizing. 1. With the symbolic shape of the voice recognition association. For example, the symbol “belongs to ∈” is similar to the pronunciation of “sh” and “sh”, and the symbol ∈ is shaped like a comb