This is a standard problem set for those who want to solidify their foundation in Mathematics I・A. Even content that is difficult to understand with just the textbook can be learned easily with the detailed explanations. ✔ No writing ✔ Instant purchase OK ✔ Bulk purchase possible ⚠️ There is a small stain on the corner (please check the photos) There is no problem with the contents, and it does not interfere with learning. I'm selling it at a lower price because of this, Recommended for those who don't mind the condition and want to build a solid foundation ✨ Feel free to comment if you have any questions ☺️