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Part A Calculations with the Counting Board N5 1 The Principle of the Counting Board
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3abl abaci Adam Riese al,Kashi Altai Mountains apex apices arithmetic astronomer bottom line British Library calculations called centenum centum chhih China classical antiquity codd computations counters lie counting board dabis digitis dabis unicuique digito Darius Vase decenum decimal fractions decimal system digit doubling and halving early medieval Exercise five pebbles follows Freeman Gerbert's given number Greek grooves Hindu-Arabic numerals horizontal Indian numerals integers invented Japanese soroban keta Liu Hui logarithms marked Mathematics medieval line board method Middle Ages millenum millia monastic abacus Napier notation omni articulo Original Indo,European performed photo by John photo from Menninger place,value Polybius quae quinary quinquies quinquies binos reckoning board reckoning table regulae reproduced by courtesy Roman hand abacus Roman numerals Russian Salamis Tablet Sccundus Scet sexagesimal Simon Stevin sixteenth century small cross space stick numerals suan pan Sun Tzu Textus Thiende thousand tshun Unit N3 Vieta word written number