实数与数轴上的点之间的关系是一一对应的,两者把数和形有机地结合在了一起,同学们在解答相关问题时,要注意灵活利用数轴上的点所表示的实数具有的性质:1.原点左边的实数都小于零,原点右边的实数都大于零,左边的实数小于右边的实数;2.原点左边的实数到原点的距离等于这个实数的相反数,原点右边的实数到原点的距离等于这个实数本身; The relationship between the real numbers and the points on the axes is one-to-one correspondence. The two combine the numbers and shapes organically together. When students answer relevant questions, they should pay attention to flexibly use the real numbers represented by the points on the axes to have The real number to the left of the origin is less than zero, the real numbers to the right of the origin are all greater than zero, the real numbers on the left are smaller than the real numbers on the right; 2. The distance from the origin to the left of the origin is equal to the opposite of the real number, The distance to the origin is equal to this real number itself;