There are three reasons: 1. I just went to school and didn't adapt to the environment. I hope parents can observe it for a few more months. Maybe your child is not particularly good at math. It is suggested to do more exercises, go to cram schools and consult teachers. If parents are capable, they can help themselves. Your child is still young and immature, and may not pay special attention to study. Maybe he will realize the importance of learning in the future and improve it.