A math problem suddenly occurred to me.

Roughly speaking,

The distance between A and B is X, Xiaoming walks from A to B at a speed, and Xiaoming's mother walks from B to A at a speed. The dog and Xiao Ming set out at the same time and walked from A to his mother at the speed of C. After finding his mother, he immediately turned back and ran to Xiao Ming, and then turned back and ran to his mother, thus turning back and forth between Xiao Ming and his mother. How far did the dog run?

Some people count the dog's first turn, second turn, third turn ... nth turn. Finally, many formulas are listed, and finally the rules are found and the answers are obtained.

Some people directly calculate the time when Xiao Ming meets his mother. Take the speed of the dog for example.

The first is people with limited ways of thinking, and the second is to understand that people have their own thinking.

For the first person, there are two situations: 1. Oh, I can think so.

2. How can you not run back?

The former is a learning thinking mode, so that people can learn mathematics well.

The latter kind of person just adapts his thinking mode to him. This kind of person is commonly known as ignorant, and it is difficult to learn mathematics well.

Mathematics is roughly a process of learning routines. In today's endless stream of routines, it is better to learn more routines and eventually form your own routines. Even if you can't form your own routine, it is enough to apply what you have learned to others' routines in appropriate occasions.