Hack #39: Turn Your Hands into an Abacus

You might have heard stories of how rapid and accurate calculations with an abacus can be, but did you know that the abacus might have been based on an ancient technique using only the human hand, which survives today as the Korean art of Chisenbop?

Additions and Suggestions

Concrete ideas to modify and expand this hack go here.

Discussion

Freeform discussion of this hack goes here.

Links

• Wikipedia on Chisenbop: http://en.wikipedia.org/wiki/Chisenbop
• Interactive, animated Chisenbop tutorial: http://www.cs.iupui.edu/~aharris/chis/chis.html

  Errata

Errata go here.

Hack Author

Ron Hale-Evans

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This is a page for a hack from the book MindPerformanceHacks by Ron Hale-Evans.