Thank you for viewing. Thinking Skills Arithmetic Workbook Series: "Dokkaisan" and "Sum and Difference/Distribution Problems" - Set of 2 Books [Dokkaisan] Series 6: Contains difficult word problems that can be solved using only the four basic arithmetic operations. [Sum and Difference/Distribution Problems] Series 3: Word problems (Grade 3 level) Used by cutting out and copying pages. ★ No writing inside For those who understand that these are used items, thank you. Please forgive any oversights as I am a private seller. I am unable to offer a discount, so please understand. Elementary school students, Grades 1, 2, 3, 4, 5, 6, 1st grade, 2nd grade, 3rd grade, 4th grade, 5th grade, 6th grade, Grade 1, Grade 2, Grade 3, Grade 4, Grade 5, Grade 6, arithmetic, numbers, addition, subtraction, word problems, figures, calculation, kanji, Japanese, words, Japanese logic, Japanese language, reading comprehension, difficult reading, elementary school, elementary school students, social studies, science, education, learning