2. The calculation must pass. This requires more practice and accumulation of methods. Do multiplication, division and simple calculation exercises twice a day to form a good habit of being careful.
3. Formulas, which define understandable memories, must be written down through understanding. Even if you forget it sometimes, you'd better perform it yourself.
4. Do more questions, read more questions and learn to solve problems.
5. Do a set of wrong questions. Summarize your usual error-prone questions, and watch and practice more at ordinary times. You can also write important questions on it.
6. Make extra efforts and believe that diligence can make up for it. As long as you have perseverance, you will learn well. The most important thing is to learn methods and solve problems with methods.