A5-sized study guide covering the basics to advanced concepts of arithmetic for parents and children. - Title: A Book That Thoroughly Explains 6 Years of Elementary School Arithmetic in One Volume - Author: Takuya Kosugi - ISBN: 978-4-7981-7658-5 - Publisher: Kanki Publishing - Contents: Based on the new curriculum guidelines from 2020 - Features: Designed for parents and children to learn together, covering a wide range from basic to advanced concepts - Size: A5 size Thank you for viewing. I purchased this new on Amazon and have never used it. Therefore, I am listing it as new and unused. Please refrain from purchasing if you are sensitive to items stored by a private individual. There are no folds or writings. *I am a non-smoker and do not have any pets. Please feel free to ask any questions in the comments section (^^) Thank you for your consideration.