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数轴是规定了原点、正方向和单位长度的直线,它有哪些功能呢?本文逐一为同学们介绍.功能一:助你直观地认识有理数小学学过的整数、小数、分数都是有理数,进入初中后又学习了负数,即负整数、负小数、负分数等,这些都是有理数.任何一个有理数都可以用数轴上的一个点来表示,最常见的有两类问题:(1)给定数轴上的点读出所表示的数;(2)把有理数在数轴上对应的点描出来.
The number of axes is provided a straight line origin, positive direction and unit length, it has what function? This article one by one for the students to introduce.Function one: to help you intuitively understand rational number of elementary learned integers, decimals, fractions are rational number, enter Junior high school and then learn the negative, that is, negative integers, negative decimals, negative scores, etc., these are rational numbers.Any rational number can be a point on the axis, the most common are two types of problems: (1) a given number The point on the axis reads out the number indicated; (2) The point corresponding to the rational number on the axis is plotted.