Explain that the child's math foundation is too poor and needs to make up lessons. Junior high school mathematics will learn geometry knowledge from the second grade, involving some boring proofs. First of all, you must learn to accept it and explain the importance of mathematics to further study. In addition, mathematics is the foundation of all natural sciences. Even if you want to do business, you have to make up classes. Pay more attention to his mathematics at ordinary times, help him pay attention to it and straighten it out!