How To Use An Abacus
From Wikibooks, the open-content textbooks collection
- Introduction
- Basics
- Addition
- Subtraction
- Exercises
- Multiplication
- Exercises
- Division
- Exercises
- Negative Numbers
- Hexadecimal Calculation with the Chinese Abacus
- Exercises
[edit] External links
- Abacus: Mystery of the Bead - An Abacus Manual
- Advanced Abacus Techniques
- Lee Kai-chen's Improved Abacus - A demonstration of how the Lee's Abacus works
