Greetings! In fact, this is a common problem with children, many of them do not understand or do not want to learn math, because this subject is really quite boring, especially for children. I faced this with my child too. So we had to look for tutors for him. In the end, we found Brighterly courses on the Internet, where they helped him and explained how to solve basic dividing worksheets, which was a problematic topic for him. So, you can turn to them too. I am sure it will bring positive results.