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Abacus lessons:
Introducing the Abacus
The Abax:
Introducing the Abax
Counting on the Abax:
Lesson 1
Lesson 2
Test
Addition on the Abax:
Lesson 1
lesson2
Lesson 3
Subtraction on the Abax:
Lesson 1
Lesson 2
Lesson 3

History of the Abacus
(not operational yet)

Related Lessons
Regrouping and Carrying
Tens Complements

Commutative Law of Addition
Order of columns in Subtraction

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How to make your own Abax
With things you have around the house.

All you need is some cardboard and some pennies. It will take about 10 minutes to make.

Watch the video, then download the PDF file of how to make an abax. It's free. Simply click on the link to view it, or right-click to download it to your computer.

Learn the basics of how to use an Abax from the links on the left, and then get some detailed lessons and practice with the MathMojo booklet,"Counting and Adding on an Abax."

Copyright 2001- 2006 by Brian Foley
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Math Mojo is part of Magic and Learning - a company which uses methods of magicians to teach thinking skills.