First, because of poor learning methods, I didn't master the methods of learning mathematics. Although the concepts, formulas and basic problem-solving methods of relevant knowledge were temporarily memorized, they were not applied in time and the problem-solving methods were not consolidated in time. After a long time, you will find that you have forgotten what you have recited in a short time, or you will not do it if you modify the basic questions slightly. The second is because the foundation is not good enough. In the process of learning, the mathematical definition and formula memory are not skilled, and the basic problem-solving steps and methods are not well mastered. This kind of students think that they have almost done all these things when reading books, but when they meet the exam, they find that they still have a lot of knowledge to master, and they often have trouble doing ambiguous questions. Third, because of the lack of logical thinking ability and habits in mathematics, everyone's thinking ability and habits are different. Some students prefer image and perceptual thinking, while numerical and logical thinking in mathematics are relatively weak. This kind of students will not have much problem with the basic knowledge and understanding of mathematics, but they may find it difficult to deal with some relatively difficult problems. To sum up, the first two situations can actually be improved through effective education. The current teaching requirements in primary and secondary schools are not only set for gifted students, so as long as effective methods are adopted, most students can meet the standards. The third situation varies from person to person and it is difficult to improve in a short time. At present, the questions used to examine students' outstanding ability in the exam are generally controlled within 20%. If students' basic knowledge and understanding reach the standard, it is not difficult to get satisfactory scores. After targeted training, this ability will gradually improve.