A set of 4 exercise problem books for System Mathematics for junior high school students. - Set includes: System Mathematics 1, System Mathematics 2 (of 8 total books) - Language: Japanese - Problem format: Exercise problems - Content: Mathematical problem solving and explanations - Publisher: Kenkyusha Publishing - Target grade level: Junior high school students Thank you for viewing. There are some check marks on the problems, and one tear. There is no writing on the problems themselves. The names on the answer key have been blacked out.