The role of math brushing is very great. First of all, brushing questions can help us consolidate and deepen our understanding of knowledge points. By constantly doing problems, you can better master the basic concepts, formulas and methods of mathematics, thus improving your ability to solve problems. Secondly, brushing questions can improve our ability to take exams. In the exam, we need to complete a large number of questions in a limited time, and brushing questions can help us get familiar with the questions and difficulties of the exam and improve the speed and accuracy of answering questions. In addition, brushing questions can also cultivate our logical thinking ability and problem-solving ability. In the process of solving problems, we need to use what we have learned to analyze, reason and judge, which will greatly exercise our thinking ability and innovation ability.

However, just relying on brushing questions can't guarantee that we can get good grades in math learning. To really improve the level of mathematics, we need to do the following:

1. Grasp the basic knowledge. Mathematics is a very basic subject. Only by mastering the basic knowledge can we learn and apply it at a higher level.

2. Pay attention to understanding and thinking. In the process of doing problems, we should pay attention to the understanding and thinking of knowledge points, rather than mechanically applying formulas and methods.

3. Be diligent in summing up. In the process of learning, we should be good at summing up what we have learned and forming our own knowledge system.

4. Cultivate good study habits. It is necessary to develop the habit of reviewing and previewing regularly to maintain the continuity and stability of learning.

5. Dare to challenge yourself. In the process of learning, we should dare to challenge ourselves and constantly improve our ability.