If you know mathematics but can't do it, it means that you only know superficial knowledge and can't master it.

First, master mathematics from theory to application.

Mathematics pays special attention to the foundation, from the most basic calculation to the extension from calculation to equation, and then to the application of geometry, all need to be studied. Many students think that mathematical thoughts and methods are not important, but in fact, with mathematical thoughts and methods, they will subconsciously analyze what kind of mathematical thoughts may be when they encounter a problem, and the application of knowledge can be more flexible and fast. Therefore, when learning mathematics, it is much more convenient to understand all the theoretical knowledge first, and then clarify the formula and put it into concrete application.

Second, think hard.

Mathematics needs thinking. Think more to be in a flexible state. It is best to preview the new knowledge spoken by the class teacher in advance. When the class teacher talks about new knowledge, write down what he doesn't understand, because mathematics is a subject that can be traced back to its source. If you don't understand what you are talking about now, it means that a certain foundation in the past has not been laid well. We can trace this knowledge back to which part of the foundation we don't understand, and then lay the foundation. Finally, you must be able to take notes, write down what you don't know, and remember more what you know, so that you can remember well, and it is convenient to deepen your understanding before remembering.

Third, do exercises.

The topic is equal to the practical application of mathematical knowledge, so if you can't learn mathematics well, take out the wrong questions and practice them alone. It may be slow to do the problem at first, so it doesn't matter if you spend more time. We can constantly apply that knowledge, so that the speed of doing problems will be gradually improved, and the sense of accomplishment will be gradually improved and done faster and faster. Review more wrong questions, practice skilled questions occasionally, and deepen your memory.