初中数学的“实数”一章,涉及的概念多,涵盖的知识点杂,初学者认为本章内容的连续性差,但是本章内容不仅是对过往有理数知识点的复习和延伸,其中的实数运算法则在初中代数运算中有极为重要的应用价值,更重要的是掌握本章知识对高中数学的学习能起到很好的铺垫和基础性作用。但在日常的教学中,笔者发现学生对本章概念性知识点理解精确程度不够、知识逻辑不清,看似简单的题目在解题中往往大费周折,怎样帮助学生构建清晰完整的知识框架,掌握高效准确的运算方法,笔者倡导从简单的比 Junior high school mathematics “real number ” chapter, involving many concepts, covering the knowledge of miscellaneous, beginners think the continuity of this chapter is poor, but this chapter is not only the review and extension of past rational knowledge point, the real number of operations The law has very important application value in junior high school algebra operation, more importantly, mastering the knowledge of this chapter can play a very good foundation and role in the study of high school mathematics. However, in daily teaching, I find that students have not enough understanding of the conceptual knowledge of this chapter, the unclear logic of knowledge, the seemingly simple topics often take a lot of trouble in solving problems, how to help students build a clear and complete knowledge framework, To master efficient and accurate computing methods, the author advocates from the simple ratio