1, mistakes are inevitable in the learning process. Whether you are careless or just can't, you should habitually collect these mistakes, and establish an independent error set for each subject. When we review before the exam, they are the key review objects, so since you missed it once, there is no guarantee that you will make mistakes twice. So as not to lose points on the same issue again.
If you are a student who is busy preparing for the exam, or a friend who wants to improve your ability, you can communicate in the "Whole Brain Speed Reading Memory Bar", which can improve your memory and learning efficiency. Persistence will pay off.