| 词条 | Book:Abacus |
| 释义 |
|title= |subtitle= |cover-image= |cover-color= | setting-papersize = a4 | setting-toc = auto | setting-columns = 1 }} Abacus
Sand table Abacus Abacus Salamis Tablet Salamis Tablet Roman abacus Roman abacus Counting rods Counting rods Rod calculus Rod calculus Suanpan Suanpan Chinese Zhusuan Chinese Zhusuan Soroban Soroban Etruscan numerals Roman numerals Roman numerals Roman arithmetic Bi-quinary coded decimal Napier's bones Napier's bones Genaille–Lucas rulers Slide rule E6B E6B
Subtractive notation Methods of computing square roots Methods of computing square roots Square root of 2 Square root of 2 CORDIC CORDIC Otis King |
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