Almost no writing in it. I used this and got over 80% on the common test (actually, this is all I did). This is the answer key for "Mathematics I+A from Basics," and it features detailed explanations and illustrations. - Title: Mathematics I+A from Basics (Answer Key) Chart Series - Author: Chart Mathematics Research Institute - ISBN: 9784641105784 - Price: ¥2255 - Pages: 336 pages Thank you for looking.