Used when my child was in 5th grade. This is a set of two books: the answer keys for the 5th-grade math drill, volume 1 and 2. These are answer keys only, but you can use them with your own red sheet. I think they are relatively clean, with no writing in them. How about using them for review, preparation, or home study? ✅ Aoba Publishing ✅ Used in the 5th grade in Reiwa 6 (2024) Please understand that these have been stored at home before purchasing. #Textbook #ElementarySchool5