This is a mathematics problem solution book, designed to build the calculation skills needed to pass exams. - Title: Gokakuru Keisan (Calculations for Success) Mathematics I・A・II・B - Author: Kazuyuki Hirose - Publisher: Bun'eido - Contents: Solutions to mathematics problems, including explanations for problems 1-89. - Price: 1,320 yen (tax included) ※ My son's entrance exams are finally over, and I am currently decluttering. ※ There are no markings in the book. Thank you for looking.