Master the basic abacus skills by learning Counting and Setting Numbers, Direct Addition and Direct Subtraction. 

Next, learn to add numbers quickly by Grouping numbers by 5 or 10 or by Counting them.

Now, learn to subtract numbers by Grouping them by 5 and 10 or by Counting. 

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. 

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