数学概念是建立数学法则、定理的基础 ,也是进行计算和证明的基础 .只有掌握好概念 ,才能充分认识事物的本质 ,做出正确的判断与推理 .在教学过程中 ,我们时常可见学生的错误与“概念不清”有缘的现象 .如何把概念讲清、讲透、讲活 ,使每一个学生都能理解、表达、应用 ,达到即 The concept of mathematics is the basis for the establishment of mathematical rules and theorems. It is also the basis for calculations and proofs. Only by mastering concepts can we fully understand the nature of things and make correct judgments and inferences. In the course of teaching, we often see student errors. With the phenomenon of “unclear concept”, how to make the concept clear, thorough, and lively, so that every student can understand, express, and apply it.