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- Subtractive_notation abstract "Subtractive notation is an early form of positional notation used with Roman numerals as a shorthand to replace four or five characters in a numeral representing a number with usually just two characters. Using subtractive notation the numeral VIIII becomes simply IX. Without subtractive notation, XIV represents the same number as XVI (16 in Arabic numerals). With the introduction of subtractive notation, XIV (14) no longer represents the same number as XVI but rather is an alternate way of writing XIIII.By encoding information about the number into the order of the numerals, subtractive notation transformed the Roman numeral system from a variation of a unary numeral system which used alphabetic characters to represent groupings of tally marks (a position-independent counting system). This form of notation closely follows Latin language usage, in which the number 18 is pronounced as duodeviginti, meaning two [deducted] from twenty (duo-de-viginti), and 19 is pronounced undeviginti, meaning one [deducted] from twenty (un-de-viginti). Subtractive notation, as opposed to the subtractive system used in the longhand form of numbers, was rarely used in Ancient Rome but became popular in the 13th century.The very positive advantage of subtractive notation is the reduction of counters needed on an abacus, the calculating devices used by the Romans, and those before them for thousands of years. They did not do arithmetic with their written numerals. They used their numerals only for recording the results of calculations on an abacus. Reduction of counters is also why they used intermediate 5 values, i.e. V, L, and D. The number of counters needed to represent IIIIIIIII, VIIII, and IX are 9, 5, and 2. Subtractive notation reflected the counter positions on an abacus with positive and negative counters on opposite sides of a median line.".
- Subtractive_notation wikiPageID "946806".
- Subtractive_notation wikiPageRevisionID "506372397".
- Subtractive_notation hasPhotoCollection Subtractive_notation.
- Subtractive_notation subject Category:Ancient_Rome.
- Subtractive_notation subject Category:Numeral_systems.
- Subtractive_notation type Artifact100021939.
- Subtractive_notation type Instrumentality103575240.
- Subtractive_notation type NumeralSystems.
- Subtractive_notation type Object100002684.
- Subtractive_notation type PhysicalEntity100001930.
- Subtractive_notation type System104377057.
- Subtractive_notation type Whole100003553.
- Subtractive_notation comment "Subtractive notation is an early form of positional notation used with Roman numerals as a shorthand to replace four or five characters in a numeral representing a number with usually just two characters. Using subtractive notation the numeral VIIII becomes simply IX. Without subtractive notation, XIV represents the same number as XVI (16 in Arabic numerals).".
- Subtractive_notation label "Subtractive notation".
- Subtractive_notation sameAs m.03sc8y.
- Subtractive_notation sameAs Q7632251.
- Subtractive_notation sameAs Q7632251.
- Subtractive_notation sameAs Subtractive_notation.
- Subtractive_notation wasDerivedFrom Subtractive_notation?oldid=506372397.
- Subtractive_notation isPrimaryTopicOf Subtractive_notation.