Of course, the text includes explanations of math problems and an answer key with exercises. I was forced to buy this at school, but as a humanities student, I didn't have any assignments using the chart, so I never opened it and it's unused. ※As you can see in the fifth photo, there's a slight crease. "New Course Chart-style Mathematics C from Basics" - Publisher: Kenkyusha Publishing - Edition: Revised Edition Instant purchase ⭕️