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Interpreting Roman Numerals
A Combs &c. Research Resource
Last updated 09 Apr 2008
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"this fourth of February 1642"
roman numerals: a system of writing numbers that is based on the ancient Roman (rather than the Arabic used in English-speaking countries today) (Combs &c. Glossary: R)
|*If the i (or I) is the only i or is the last in a series of i's, it may be written as a j rather than an i (as in the example above), a style seen particularly common in old-style writing.|
|two hundred etc.||100||CC|
|six hundred &c.||600||DC|
|two thousand &c.||2,000||MM|
- If a number is followed by smaller number, ADD the two
- If a number is followed by a larger number, SUBTRACT the small from the large
- If a number is followed by number of equal value, ADD the two
- If a small number is below a larger number, MULTIPLY the two
|VI||6||(5 + 1)|
|IX||9||(10 - 1)|
|XX||20||(10 + 10)|
|10,000||(5 x 2,000)|
|MCDLXXI||1471||(1000 + (500 - 100) + 50 + 10 + 10 + 1)|
Roman numeral graphic courtesy Fred Smoot's America Writes Home
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