【Yotsuya Otsuka】 Yosyu Series Arithmetic 5th Grade Exercise Workbook, Volume 1 (Upper) Exercise Workbook, Volume 2 (Lower) The books have names written on them, which will be erased or cut out before shipping. There are some notes and red pen check marks indicating incorrect answers. For some reason, the Yosyu Series only has the answers and explanations in the same book for arithmetic, which makes it very difficult to use. I have separated them with a cutter and made them into a separate booklet with masking tape. Therefore, the overall condition is listed as poor. However, it was very comfortable to use when doing homework. These books were used at a cram school, so I will sell them to someone who doesn't mind the details. This is for students who will finish in 2026.