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The Soroban Site of the Visual Math Institute
Soroban Notes
Background information on math education and the soroban.
- Soroban Note 1
- Evolution of the Five Bead. Video, 6 minutes (18 Sept 2010)
- Soroban Note 2
- Beyond the Five Bead. Video, 6 minutes (01 Oct 2010)
- Soroban Note 3
- The Slavonic Abacus. Video, 3 minutes (12 Oct 2010)
Soroban Note 4
Preparing for Multiplication. Video, 3.5 minutes (22 Jun 2012)
Soroban Note 5
Preparing for Division. Video, 3 minutes (29 Jun 2012)
Soroban Note 6
Multiplication Step-by-Step. Video, 8 minutes (19 Jul 2012)
Stepping through Tutorial #14 (2-digit multiplier)
Revised 20 July 2012 by
Ralph Abraham
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