Thank you very much for viewing. Instant purchase is welcome. [Unused] A training book to cultivate mathematical thinking for elementary school students. - Title: Arithmetic Brain Training from Grade 4 - Author: Masanobu Takahama - Publisher: Z-kai - Contents: Training methods for developing mathematical thinking - Target age: Elementary school students - Accessories: Drill for children included (in the latter pages of this book) The obi (paper band) has some discoloration and stains. It has never been used, so the contents are clean with no writing. * Ships within 24 hours * Anonymous shipping