Low-level mistakes have nothing to do with carelessness. They are caused by your lack of practice and study. For example, you often make mistakes in a boring solution. In addition to the above reasons, it is also possible that you are not familiar with this kind of problem and can only come up with a cumbersome and error-prone solution to solve the problem. People who are good at mathematics can think of more ingenious methods, which are simple and easy to calculate, and can perfectly avoid low-level mistakes.
Don't just be content to ask questions when you usually ask questions. Evaluate your own methods. If it is too complicated and error-prone, think of a simpler and more error-prone method. In addition to the first time, there is another high school math problem called "error-prone problem" or "trap problem", which is particularly disgusting and not particularly difficult, but it is easy to make mistakes if you don't pay attention. I didn't do the "error-prone question", probably because the students didn't grasp the test center enough. Why is it called a trap? If you don't know where the questioner puts the trap, it's easy to be fooled. If you can predict in advance, you can skip the trap perfectly.
So we can usually pay attention to the "traps" that are easy to appear in each kind of topic, that is, the points that are easy to make mistakes. Summarize the error-prone points into questions, look at them when you are bored, and form a memory. We can recall these error-prone points as soon as we encounter such problems in the examination room, so that the so-called error-prone questions will not be broken. Some students may feel that the trap is strange. How do you summarize them? No, no, no, there is really no need to overestimate the level of librarians. Librarians have very limited ways to set traps. If they insist on summing up for a period of time, those points that are prone to mistakes can basically be exhausted.
In fact, it is almost impossible to completely avoid low-level mistakes. Everyone will make some mistakes more or less. Don't be too remorseful when you find low-level mistakes after the exam. After all, everyone has it. Of course, we should also try our best to reduce our own low-level mistakes and the losses caused by them, so that the score can be improved.