Learning the Abacus
Welcome to the
Learning the Abacus
website!
In this website, we use numerous examples with step-by-step instructions to calculate the correct solution. At this point , all of the examples use one or two Cranmer abacuses (abaci) or Japanese abacuses (abaci). Future pages will use other types of abaci.
The number approximation for Pi, to 12 decimal places using a Cranmer or Japanese abacus
If you are just beginning to learn to use an abacus, we suggest you start with the Getting Started pages. Then, continue to develop you calculation skills for whole numbers and decimals, using the Addition, Subtraction, Multiplication, and Division pages. The Decimal page has quick links to the decimal sections in in the addition, subtraction, multiplication and division pages. Next, you can use the Fractions page to learn to add, subtract, multiply and divide fractions. You may also find the link to A Short History of Numbers and the Abacus very interesting.
Master the basic abacus skills by learning Counting and Setting Numbers, Direct Addition and Direct Subtraction.
When you have learned abacus addition, continue learning Multiplication (rapid addition) using the Single Abacus Approach, the simpler Double Abacus Approach, or by Counting
After you have learned Addition, Subtraction and Multiplication, you are ready to learn Division (rapid subtraction) using the Single Abacus Approach, the simpler Double Abacus Approach or by Counting
This section will help you learn to add, subtract, multiply and divide Fractions using the Single Abacus Approach or the simpler Double Abacus Approach
Building on the skills you have learned, this section provides quick links to adding, subtracting, multiplying and dividing Decimal numbers.
Some learners may be interested in this article on the History of Numbers and the Development of the Abacus.
The material in this website is also available in book (PDF) format for you to download at no cost. Click on the link above to display the available books.