2. A>b means that A is greater than B;

3.a < b means that a is less than b;

4. For any two real numbers A and B, their corresponding points A can be found on the same axis. If point a is to the right of point b, then A >；; b；

5. For any two real numbers A and B, their corresponding points A and B can be found on the same axis. If point a is to the left of point b, then a

Extended data:

Symbol origin:

In 629, the French mathematician Zhilal adopted the symbol "ff" to indicate "greater than" and "less than" in his algebra course. For example, if 5 is greater than 1, it is recorded as "5ff 1", and if 2 is less than 3, it is recorded as "2 3".

163 1 year, the British mathematician harriot invented the symbol ">", which means "greater than" and "

In the same year, the mathematician Mr. Uribe invented the use of "? ] "stands for" greater than "; Use "_]" to indicate "less than".

But in later practice, people gradually found that some inequalities were complicated to write, so they were quickly eliminated. Finally, there are only ">" and "

From then on, when expressing the relationship between two quantities, you can use "=" > "