The speed in primary school mathematics is a number, which only indicates the speed of object movement, and can be directly used for algebraic operations, such as addition, subtraction, multiplication and division.

The speed in senior high school physics includes not only the speed of the object's movement, but also the direction of the object's movement, which is called vector. Speed and speed cannot be directly algebraic, and there is a special vector operation method for the synthesis of speed.

So the speed in primary school mathematics is actually only a part of the speed in high school physics, which is called speed in high school physics.