Roman Numerals

I - I is 1, II is 2, III is 3.

V - V is 5. In front subtract. So IV means 4.
Behind add. - VI is 6, VII is 7, VIII is 8.

X - X means 10. IX is 9.
X's indicate the tens. So XXXI is 31, and XXIV is 24.

L - L means 50. XL is 40.
And 60, 70, and 80 are LX, LXX and LXXX.

C - C stands for centum, the Latin word for 100.
Words like "century" and "cent." XC is 90. CCCLXIX is 369.

D - D stands for 500. CD means 400. So CDXLVIII is 448.

M - 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 didn't have a symbol for zero

Contributed by ^www.TheMathWebSite^.com.