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Line 14: − − They can still be found today when showing dates for movies or television shows. + + + +
broke off comment on modern usage into new section.
== Subtraction ==
== Subtraction ==
Letters are put in order from greatest to least. A lesser letter occurring before a greater letter is subtraction. When subtracting, only subtracting powers of ten such as I, X, or C is allowed. You cannot subtract with V, for example. Too, you can only subtract one digit away. For example, IIX is not 8 but rather use VIII for 8. Finally, you cannot subtract one letter from another letter if it is ten times greater than it, so one would not be able to subtract X from M since M is one hundred times greater than X, yet you can subtract X from either L or C.
Letters are put in order from greatest to least. A lesser letter occurring before a greater letter is subtraction. When subtracting, only subtracting powers of ten such as I, X, or C is allowed. You cannot subtract with V, for example. Too, you can only subtract one digit away. For example, IIX is not 8 but rather use VIII for 8. Finally, you cannot subtract one letter from another letter if it is ten times greater than it, so one would not be able to subtract X from M since M is one hundred times greater than X, yet you can subtract X from either L or C.
* Example: MCMLXXXIII = 1983
* Example: MCMLXXXIII = 1983
* Example: MCC = 1200
* Example: MCC = 1200
== Modern Use ==
While the [[Arabic_numerals|Arabic system]] has become the standard contemporary numeral system, Roman numerals are still used today in limited settings. They express dates on building [[Cornerstone|cornerstones]] or denote an epoch in [[art]] or [[literature]]. They also count installments in a series, such as movie sequels, the [[Super Bowl]], the [[Ultimate Fighting Championship]], or the [[Olympics]].
[[category:mathematics]]
[[category:mathematics]]
[[category:roman history]]
[[category:roman history]]