Insert a table, first create a new word document, then open it, click Insert directly, and then select a row of tables to insert text.

On the number axis, except the number 0, it should represent any rational number that is not 0. According to the sign of this number, determine which side of the number axis it is on, then determine that it is several unit lengths away from the origin in the corresponding direction, and then draw the corresponding point.

In addition, a point on the number axis is 1, that is, the line segment from the origin to this point contains 1 unit length, and the specific length is not limited. In addition, a unit length on the number axis does not necessarily represent a grid. For example, you can also mark a grid with 5, which can be considered as shrinking the coordinate system for some needs.

In mathematics, numbers can be represented by points on a straight line, which is called a number line and meets the following requirements:

(1) Take any point on a straight line to represent 0. This point is called the origin.

(2) Generally speaking, it is a positive direction from the origin to the right (or upward) and a negative direction from the origin to the left (or downward).

(3) Choose an appropriate length as the unit length, and take a point every other unit length on the straight line from the origin to the right, which means 1 (1 unit length to the right) and 2 (2 unit length to the right) in turn.