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History
Hindu–Arabic numeral system
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The Hindu–Arabic numeral system is a positional base ten numeral system for representing integers; its extension to non-integers is the decimal numeral system, which is presently the most common numeral system.
Modern-day Arab telephone keypad with two forms of Arabic numerals: Western Arabic numerals on the left and Eastern Arabic numerals on the right
Modern-day Arab telephone keypad with two forms of Arabic numerals: Western Arabic numerals on the left and Eastern Arabic numerals on the right
The Arabic numeral system first appeared in Europe in the Spanish Codex Vigilanus, year 976.
The Arabic numeral system first appeared in Europe in the Spanish Codex Vigilanus, year 976.
Adam Ries, Rechenung auff der linihen und federn, 1522
Adam Ries, Rechenung auff der linihen und federn, 1522
Two arithmetic books published in 1514 – Köbel (left) using a calculation table and Böschenteyn using numerals
Two arithmetic books published in 1514 – Köbel (left) using a calculation table and Böschenteyn using numerals
Decimal
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The decimal numeral system is the standard system for denoting integer and non-integer numbers. It is the extension to non-integer numbers of the Hindu–Arabic numeral system. The way of denoting numbers in the decimal system is often referred to as decimal notation.
Ten digits on two hands, the possible origin of decimal counting
Ten digits on two hands, the possible origin of decimal counting
Diagram of the world's earliest known multiplica­tion table (c. 305 BCE) from the Warring States period
Diagram of the world's earliest known multiplica­tion table (c. 305 BCE) from the Warring States period
The world's earliest decimal multiplication table was made from bamboo slips, dating from 305 BCE, during the Warring States period in China.
The world's earliest decimal multiplication table was made from bamboo slips, dating from 305 BCE, during the Warring States period in China.
counting rod decimal fraction 1/7
counting rod decimal fraction 1/7