But some children are poor at math because they have not developed good study habits since childhood. When children just started school, they didn't form good habits, which led to the children's mathematical thinking not being fully exercised. If children want to learn math well, they should start with counting and exercise their math ability in a targeted way.
It may also be because of lack of practice and familiarity. Practice makes perfect. Although we don't approve of brushing many questions, moderate exercise is essential.