概念是反映对象本质属性的思维形式。人类在认识过程中,把所感觉到的事物的共同特点,从感性认识上升到理性认识,抽出本质属性而成。表达概念的语言形式是词或词组。概念都有内涵和外延,即其含义和适用范围。概念随着社会历史和人类认识的发展而变化。概念在各学科的学习中都是十分重要的,数学学习中理解概念也是关键,学数学的关键是理解并掌握课本中的概念,不能死记硬背,要明白概念的内涵,特别是关键字词及其重要特征,对于许多类似概念,要在比较中理解,然后在理解的基础上记忆。 Concept is a form of thinking that reflects the nature of the object. In the process of cognition, humankind has raised the common characteristics of the things perceived from the perceptual knowledge to the rational cognition and extracted the essential attributes. The language of expression concept is word or phrase. Concepts have connotation and extension, that is, its meaning and scope of application. The concept changes with the development of social history and human knowledge. The concept of learning in various disciplines is very important, the concept of mathematics learning is also the key to understanding, the key to learning mathematics is to understand and grasp the concept of textbooks, can not memorize, to understand the concept of connotation, especially the key words And its important features, for many similar concepts, to understand in comparison, and then based on understanding memory.