There are three exercise books for seventh grade mathematics, which are tutoring and one-off. Wan Wei and Wan Wei are better. Judging from the public information about the inquiry, the questions in the explanation are relatively simple and the content is not comprehensive enough. It is not difficult to pass the questions once, and it is generally suitable for children with poor foundation. Wan Wei's content is closely combined with real questions, including several types of exercise books, including basic questions, finale questions and large and small volumes. Any content you want to do can have corresponding questions, which are wide in scope, rich in content and moderate in difficulty, and suitable for children to improve their abilities.