Roman numerals are a numeral system that originated in ancient Rome and remained the usual way of writing numbers throughout Europe well into the Late Middle Ages. Like many other ancient numeral systems, Roman numerals are based on the additive principle: a number is written by concatenating individual symbols, each representing a fixed value, and the value of the resulting numeral phrase is the sum of the individual values of each letter.
Roman numerals are a numeral system that originated in ancient Rome and remained the usual way of writing numbers throughout Europe well into the Late Middle Ages. Like many other ancient numeral systems, Roman numerals are based on the additive principle: a number is written by concatenating individual symbols, each representing a fixed value, and the value of the resulting numeral phrase is the sum of the individual values of each letter.
Source: Wikipedia "Roman numerals" · CC BY-SA 4.0
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