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Napier's Bones
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Napier's Bones invented in 17th century for performing multiplication and complex math.
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Model information
- Source
- Printables
- Category
- Math
- License
- Creative Commons — Attribution — Noncommercial — Share Alike
Napier's Bones created by Napier in 17th century to perform complex math without having to know more than basic addition rules. Two sets presented, with recessed or raised numbers (recessed requires more precise printer).
To use, simply line up the ‘bones’ to represent the number you want to multiply, then read the answer from right to left on the row of the digit you wish to multiply. Add numbers on the diagonal, and perform any carries as you would with normal addition.