1 and 53 are more basic and less difficult, so they are more suitable for students at all stages. Primary school students' homework problems are more classic, and there are fewer basic problems. Compared with 53, the difficulty is increased, which is suitable for children of medium height. So it's better to practice every day for 53 days.

2, 53 Daily exercise is a set of systematic extracurricular tutoring materials for primary schools. According to the subject and grade, provide a certain amount of exercises and knowledge points every day to help children practice and review regularly every day, and comprehensively improve the ability of various subjects. Xueba is a workbook written according to the content of the textbook, covering the exercises and homework problems of various disciplines. It is better for students with weak foundation to practice once every 53 days.