There are many reasons why math is not good.
First, there may be inadaptability to the environment. Psychologists believe that the first grade is the first and most important challenge in a child's life, and it needs to solve problems such as learning, competition and peers. If family education is not done well, there will be problems of poor study. This is a reflection of other problems, not a child's intelligence problem.
Second, it is possible that the child's intelligence has not kept up. According to the theory of psychological development, about 6 years old is just the transition from the previous operation stage to the specific operation stage. Some children develop slowly, have a worse understanding of concepts, and so on.
Third, there are too few numbers in life to cultivate a sense of numbers. Yes, practice counting more and do 20 oral calculations every day. Do some math games in life, such as buying and selling. Stick to it for a semester, and math will definitely go up.
To sum up, some children learn math early and teachers teach it quickly. Because this problem can't keep up, so don't worry. Pay attention to the cultivation of study habits when making up lessons. The shortcomings of knowledge can be made up quickly, but the influence of study habits is lifelong.