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Roman Numerals
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I is 1, II is 2, III is 3.
V is 5. In front subtract. So IV means 4.
Behind add. - VI is 6, VII is 7, VIII is 8.
means 10. IX is 9.
X's indicate the tens. So XXXI is 31, and XXIV is 24.
L means 50. XL is 40.
And 60, 70, and 80 are LX, LXX and LXXX.
C stands for centum, the Latin word for 100.
Words like "century" and "cent." XC is 90. CCCLXIX is 369.
D stands for 500. CD means 400. So CDXLVIII is 448.
M is 1,000. Ms are used to indicate dates.
For instance, 1998 is written as MCMXCVIII.
The big differences between Roman and Arabic numerals
are that Romans did not have a symbol for zero

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