1. Establish good study habits: make a reasonable study plan, keep a certain amount of study time every day, and study persistently. At the same time, we should develop good review habits, review what we have learned in time and lay a solid foundation.

2. Mastering basic knowledge: Mathematics is a step-by-step subject, and mastering basic knowledge is the key to improving mathematics performance. We should focus on reviewing the basic knowledge of high school mathematics, including algebra, geometry, probability and statistics.

3. Do more exercises: Mathematics is a very practical subject, and only through a lot of practice can we master the problem-solving skills and thinking mode. You can choose some classic problem sets to practice, and pay attention to analyzing the ideas and methods of solving problems.

4. Pay attention to thinking training: In the math exam, we should not only master the knowledge points skillfully, but also have strong logical thinking and problem-solving ability. You can cultivate your thinking ability and problem-solving skills by doing some thinking training questions.

5. Take more mock exams: mock exams can help us get familiar with the exam form and rhythm, and also test our learning effect. You can take some online or offline mock exams, find your own shortcomings in time, and review them in a targeted manner.

6. Ask for help: If you encounter difficulties in the learning process, you can ask for help from teachers, classmates or postgraduate remedial classes. They can give you some advice and guidance to help you solve the problem.

In a word, improving the math scores of postgraduate entrance examination requires persistent study and practice, and at the same time pays attention to mastering basic knowledge and cultivating thinking ability. Through reasonable study methods and strategies, I believe you will get good grades.