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Abacus
Find out what an abacus is, how it got its name, what it's used for, and more.http://www.smm.org/boghopper/Abacus.html
Abacus: The Art of Calculating with Beads
Slide into math magic with these beads.http://www.ee.ryerson.ca:8080/~elf/abacus/
ALOHA Abacus Museum
Traces the history of the Chinese abacus and other calculating machines. Site includes pictures, history, and information about the museum.http://www.alohama.com/abacus.htm
Invention of the Abacus
Read about why and how this tool was invented around 5000 years ago.http://www.ideafinder.com/history/inventions/abacus.htm
Math Mojo with the Abacus
Learn how to use an abacus, find out about its history and what it's used for, and find out what counting boards are all about.http://www.mathmojo.com/abacus/mathmojowiththeabacus.html
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