实数概念是初中数学中一个很重要组成部分 ,学好实数概念 ,对学好整个数学学科将起着至观重要的作用 .因此 ,在教学中要引导学生理解好下列问题 :1　创新是数学发展的动力人类在与大自然的不断抗争中逐步认识到“数” ,不断将数由自然数拓展到分数 ;由正数拓展到负数 ,把数的理 The concept of real number is a very important part of junior mathematics. Learning the concept of real numbers will play an important role in learning the whole mathematics discipline. Therefore, we must guide students to understand the following issues in teaching: 1 Innovation is the driving force of mathematics development. In the constant struggle with nature, humans have gradually realized the “number”, constantly expanding the number from the natural number to the fraction; from the positive number to the negative number, and the number