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Unformatted text preview: Hieroglyphics Placevalue system O Babylonian, 2000 BC O note base60 O two wedge shapes in clay tablets O no symbol for 0 O e.g. meaning of << is ambiguous The invention of zero O Babylonian, 300200 BC O Mayan, Chinese & Indian cultures, independently O Meaning of 0: null, space, 1010 Indian numerals 2500 BC, system is complete 1. unique symbols 19 2. base10 3. placevalue notation 4. has zero the most successful intellectual innovation ever made on our planet Algorists vs Abacists Algorist smugly demonstrates memory, placevalue, fractions. Dame Arithmetica presides in judgement  with IndoArabic numerals on her gown!...
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 Fall '07
 Pottebaum

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