This is a problem set separate from the main curriculum for Nichenoken 5th grade arithmetic, and it comes with an answer key. I will cut off the part with the name on the back, but I don't think it will be a problem. (Only the textbook) Please check the photos. There is almost no writing in the textbook (there might be some writing that I missed). I think it will be helpful for improving your arithmetic skills. Please understand that this is a used item. Thank you for looking.