数学概念是一切基础知识的基石。是整个数学内容的“脉络”,是逻辑推理的依据,是正确、迅速地进行运算的基本保证。概念教学的要求是:使学生理解概念并在此基础上牢固掌握 Mathematical concepts are the cornerstone of all basic knowledge. Is the “thread” of the entire mathematical content, is the basis for logical reasoning, and is the basic guarantee for correct and prompt operation. The concept of the concept of teaching is: to enable students to understand the concept and firmly grasp the basis