Arithmetic textbook for elementary school students in grades 4-6. - Title: Understand Arithmetic - Publisher: Obunsha - Target Grade Level: Elementary School Grades 4-6 - Price: ¥2,600 + tax - Reprinted in 2015 #UnderstandArithmetic Obunsha #ElementarySchoolArithmeticReferenceBook I bought this for my daughter about 10 years ago, but she hardly used it, so I've been storing it. If you are interested, please consider purchasing it! Thank you for looking! (^-^)