The math book published by People's Education Press, the first volume of the fifth grade is mainly divided into these seven parts, all of which have difficulty. It's just that the degree of difficulty is slightly different, and it's a gradual process.
Moreover, in the last eighth part, it is a process of reviewing all the time. Only this version of PEP is introduced here. The textbook of the first volume of the fifth grade math book, and then there are many other versions, all of which have different contents, so these are the main contents of the first volume of the fifth grade math book.