Yotsuya Otsuka / Waseda Academy, Arithmetic, Year 5, Volume 2 (Lower) - Title: Arithmetic 5 Lower - Workbook: Practice Workbook - Explanation: Explanation/Answers There are a few notes written in it, but it's generally clean and can still be used for studying. Since it's been stored at home, there may be some minor scratches on the cover. Please purchase only if you understand that this is a used item. Instant purchase is OK. Thank you very much. Thank you for looking.