A book that covers all the math knowledge necessary for junior high school entrance exams. - Title: Complete Understanding of Elementary School Math - Target Grade Level: Elementary School Grades 3-6 - Content: All the knowledge required for junior high school entrance exams - Example Problems: Includes practice problems to test your skills - Publication Year: 2020 Thank you for viewing. The inside is clean, but there are some areas where the corners are slightly bent. There is no problem with using it.