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by jacobolus
3147 days ago
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Your video link just shows the common lattice method for writing the standard multiplication algorithm, used since at least the 1200s by Arabs and common around the world ever since. Napier's bones is a physical artifact, which tries to eliminate the required memorization of a 1-digit multiplication table, and is very rarely used in practice by anyone anywhere. https://en.wikipedia.org/wiki/Lattice_multiplication |
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