概念是我们学习数学知识的基础，是学好数学的关键。在数学教学中，无论是公式的推导，定理的证明，习题的计算等知识的应用都与概念有紧密的联系。课堂教学中如何引入新概念，是教学活动中经常遇到的问题，它直接影响到能否激发学生的学习兴趣，调动学生学习的积极性，使学生 The concept is the basis of our knowledge of mathematics and the key to learning mathematics. In mathematics teaching, both the derivation of the formula, the proof of the theorem, and the application of knowledge in the calculation of the exercises are closely related to the concept. How to introduce new concepts in classroom teaching is a problem often encountered in teaching activities. It directly affects whether students’ interest in learning can be stimulated, and students’ enthusiasm for learning can be mobilized to make students