Little Abacus 8-11 (4 books to learn the basics for grades 6 to 3)

A beginner's abacus learning set from the popular "Chibiko Soroban" series of abacus teaching materials for young learners. The set includes four books (volumes 8 to 11) that introduce levels 6 to 3 (with helpful explanations). *Explanations and answers are included. The teaching materials use illustrations and are easy to understand and provide helpful instruction. (Each volume is B5 size, 48 pages) Little Abacus 8: ●Grade 6 Basics (3-digit estimate, multiplication x 2-digit/3-digit, division ÷ 2-digit, quotient 1-digit/2-digit) (Reduction Calculation/Kyu-Ritsu Commerce) Little Abacus 9: ●Grade 5 Basics (4-digit estimate, multiplication x 4-digit, division ÷ 3-digit, quotient 2-digit/3-digit) (Large Reduction) Little Abacus 10: ●Grade 4 Basics (5-digit estimate, multiplication x 5-digit, division ÷ 3-digit, quotient 4-digit/4-digit) Little Abacus 11: ●Grade 3 Basics (6-digit estimate, multiplication x 5-digit, division ÷ 3-digit, quotient 4-digit/4-digit) (Decimal Calculation/Treatment of Rounding) *Multiplication means multiplication. *Division means division. Size: B5 Number of Pages: 48