Mathematics is a very abstract thing. The key to learning mathematics well lies in careful logical thinking ability, and learning mathematics can really cultivate people's ability. Making mistakes is really not carelessness, mainly because we have not cultivated our logical thinking ability. Of course, this can be cultivated. I think we should start with the cultivation of logical thinking ability. For example, to do a math problem, first let him think clearly about the steps to do it. Just like where you are going, what street, and what unit you are going to school, you have to have this before you can start writing. Be clear. Do the problem step by step along this line. After the problem is finished, you can remember how to do it. I don't know if you have noticed that sometimes a child does the right thing after finishing the problem, but if you ask him to dictate or do it again, he says he can't do it. This is that he has no thoughts in his mind. Where you want to do it, where you want to do it, it's a mess. Although the topic is done correctly, it is also done unintentionally. This is an unconscious thinking. Therefore, when learning mathematics, don't pursue too many questions, do them one by one, and do them again and again when you meet something that can really open your mind.