Roman Numerals 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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