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一、掌握下列基础知识:1.乘方与开方互为逆运算;2.平方根:3.立方根:4.实数,实数与数轴上的点的对应关系,数的不断扩充的必要性与可行性.二、掌握本章的知识结构和实数的分类方法,侧重于理解.三、本章学习的重点是对相关概念的理解.为便于同学们学习和复习本章,请看以下问题.例1怎样理解“任何有限小数或无限循环小数都是有理数”?分析:这句话的意义是“任意的有限小数或无限循环小数都能化为整数或分数的形式”.容易验证,
First, master the following basic knowledge: 1. The square and the square each other inverse computing; 2. Square root: 3. Cube root: 4. Real numbers, the real number and the number of points on the axis of the relationship between the number of the necessity and feasibility of continuous expansion Second, to grasp the classification of knowledge structure and real number of this chapter, focusing on understanding.Three chapters, the focus of this chapter is to understand the related concepts.In order to facilitate students to learn and review this chapter, see the following questions .Example 1 how to understand “Analysis: The meaning of this sentence is ” any finite decimal or infinite loop decimal can be converted into an integer or fractional form "easy to verify,