The chapters with asterisks in the book indicate that the content or practice is difficult, or the content that is not required indicates that students have different requirements for mastery, such as understanding and comprehension; Those with an asterisk in the textbook can study selectively.

Books are the main tools used by human beings to record all achievements, generally referring to paper bound into volumes and printed with words; It is also an important medium for human beings to blend feelings, acquire knowledge and inherit experience, which is of great significance to the development and inheritance of human civilization. Mathematics textbooks, mathematics teaching books. While strengthening the teaching of basic knowledge, primary school mathematics textbooks should pay attention to cultivating students' computing ability, initial logical thinking ability and spatial concept, as well as their ability to solve simple practical problems. Middle school mathematics textbooks include algebra, plane geometry, solid geometry and so on.