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how counting began
practical operation of the ten system
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abacus accurate adopted advantages Answer Arabic Arabic numerals Base 12 calculation cent coinage column common factor common logarithm complete accuracy computation cubic deci decimal logarithms divi divided dozen duodecimal logarithms eggs error exactly example existing expressed feet fingers four-place fractional quantity given number inches invention limited revolving number logarithmic tables long division mantissa mathematicians means method metric system monthly interest multiplication tables nearest number base number system based numbers ending o o o o o o o o o o o o o o obvious odd numbers oooo ooooo oooo ooooo oooo ooooo original possible fractions practical present number system prime number Problem quarter reason repeating decimal represent rithms Roman numerals simple sion six-place decimal square subtract superior symbols system of 12 tens tenths third tions totals twelfths twelve units weights and measures whole numbers zero