Roman Numerals

 

Roman numerals are expressed by letters of the alphabet.

 

There are four basic principles for reading and writing Roman numerals:

 

• 1. A letter repeats its value that many times (XXX=30, CC=200, etc.). A letter can only be repeated three times.

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• 2. If one or more letters are placed after another letter of greater value, add that amount. VI=6 (5 + 1=6) LXX=70 (50 + 10 + 10=70) MCC=1200 (1000 + 100 + 100=1200)

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• 3. If a letter is placed before another letter of greater value, subtract that amount. IV=4 (5 – 1=4) XC=90 (100 – 10=90) CM=900 (1000 – 100=900)

 

 

Convert numerals here:  

 

http://www.onlineconversion.com/roman_numerals_advanced.htm