实数与数轴上的点之间的关系是一一对应的,这两者把数和形有机地结合在一起.近年来的中考题中,经常遇到有关实数与数轴的综合题.例1如图,点A、B在数轴上对应的实数分别为m、n,则用含m、n的式子表示A、B两点间的距离是.分析:A、B两点间的距离等于线段AB的长.又AB=OA+OB,要求A、B两点间的距离,应先确定OA和OB的长. The relationship between the real number and the number of points on the axis is a one-to-one correspondence between the two numbers and shape organically together. In recent years, senior high school entrance examination questions, often encountered on the real number and axis of the comprehensive questions. Figure, point A, B in the number of axes corresponding to the real number were m, n, then with m, n expression A, B distance between two points is. Analysis: A, B is equal to the distance between two points AB length. And AB = OA + OB, request A, B distance between two points, should first determine the length of OA and OB.