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Abacus lessons:
Introducing the Abacus

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

Get an Abax

 

Related Lessons
Regrouping and Carrying

Tens Complements

Commutative Law of Addition

Order of columns in Subtraction


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Classic Puzzles

This is where you will begin to find some classic math and logic puzzles, and lessons attached to them.

The first ones are about connecting points or circles with lines. They are the only ones up at the moment, but they are very interesting, and illustrate some important ways to be able to think. Check them out.

Check out the puzzle of the day for:

Copyright 2001- 2003 by Brian Foley
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Math Mojo is part of Magic and Learning - a company that uses methods of magicians to teach thinking skills.