“实数”是初中数学的“数与代数”中的重要内容,是中学数学的基础知识.它为后面学习二次根式、一元二次方程以及解三角形等知识作了铺垫,每年各地的中考都会考查.本章内容难度较低,在中考中往往以中低档试题的形式出现,常考题型有填空题、选择题和计算题.学习“实数”时,同学们应该在理解每个概念的基础上,认真分析各知识点之间的 “Real number” is an important part of the “numbers and algebras” of junior middle school mathematics. It is the basic knowledge of middle school mathematics. It paves the way for learning secondary roots, a quadratic equation, and solving triangles. All local exams will be examined. The contents of this chapter are less difficult, and often appear in the form of middle-to-low exam questions in the mid-term exam. Frequent exam questions include blank-fill questions, multiple-choice questions, and calculation questions. When students are learning “real numbers,” students should understand it. Each concept is based on a careful analysis of the knowledge points