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数轴是学习正负数的基础,任何一个有理数,都可以有数轴上的点来表示,我们学习相反数和绝对值,也需要借用数轴,来加深对概念和认识和理解。数轴是数形结合的基础,它使直线上的点和实数之间建立起了对应关系,扩充到平面直角坐标系,就使平面内的点和有序实数对之间建立起对应关系。现分析数轴的常考点,和大家共同加以归类浅析。
The number axis is the basis for learning positive and negative numbers. Any rational number can be expressed by the points on the axis. When we study the opposite number and the absolute value, we also need to borrow the number axis to deepen the concept, understanding and understanding. The number axis is the basis of the combination of number forms. It makes the correspondence between the points on the line and the real numbers. Expanding to the plane rectangular coordinate system makes the correspondence between the points in the plane and the ordered real numbers pair. Now analyze the number of axes often test points, and we together to classify.