中专数学大纲中明确指出：“正确理解数学概念是掌握数学基础知识的前提，要使学生理解概念的实质及数学知识的内在联系”。为了达到这个目的，教师在数学教学前必须全面了解概念的渊源，深刻理解概念的内涵和外延，讲授起来才会得心应手，学生应用起来才不会盲目。本人依据中 The outline of secondary school mathematics clearly states: “Correct understanding of mathematical concepts is the prerequisite for grasping the basics of mathematics and for students to understand the essence of concepts and the inherent connection of mathematical knowledge.” In order to achieve this goal, teachers must fully understand the origin of concepts before teaching in mathematics, deeply understand the connotation and denotation of concepts, teach them to be handy and students should not blindly apply them. I based