(1) You only know shallow knowledge, but you don't go deep into it, and what you master can't reach the height of application;
(2) Some students try a little and think they can do it. For example, an example teacher talked about three methods, and after understanding one, he would not listen to other solutions.
(3) Understand the knowledge, but can't remember it, or don't understand how to apply it;
(4) Lack of guidance of mathematical thinking methods, such as equation thinking and classified discussion thinking are all important mathematical thinking methods;
In addition, some students simply don't listen to math because of lack of confidence, so they can't go deep into it.
We all want to learn math well, but "since we want to learn math well, why not?"
Necessary conditions for learning mathematics well: good habits; Good foundation; Good method. This is the "three good students" in learning. Three good students make a good one (good grades), and none of them are indispensable.