1, find out the reference coordinates of the moving point, that is, the starting coordinates of the movement;

2. Calculate the coordinates of the moving point:

Move to the right: coordinates after moving? =? Datum coordinates? +? Movement distance;

Move to the left: coordinates after moving? =? Datum coordinates? -? Movement distance;

3. Indicate the length of the line segment: What is the number indicated at the right end of the line segment? -? The number represented by the left end of the line segment.

The number axis is a specific geometric figure. A straight line is a collection of countless points, and there are countless real numbers including positive real numbers, zero real numbers and negative real numbers. Because of their * * * nature, they use countless points on a straight line to represent real numbers. At this time, a straight line with origin, positive direction and unit length is used to represent real numbers. When the right side is defined as the positive direction, the number represented by the upper point on the right side of two numbers on this straight line is always greater than the number represented by the upper point on the left side, positive numbers are greater than zero, and zero is greater than negative numbers.

A straight line is a collection of countless points, and there are countless real numbers including positive real numbers, zero real numbers and negative real numbers. Because of their * * * nature, they use countless points on a straight line to represent real numbers. At this time, a straight line with origin, positive direction and unit length is used to represent real numbers. When the right side is defined as the positive direction, the number represented by the upper point on the right side of two numbers on this straight line is always greater than the number represented by the upper point on the left side, positive numbers are greater than zero, and zero is greater than negative numbers.