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Roman Numerals
Term | Definition |
---|---|
I | 1 - One |
V | 5 - Five |
X | 10 - Ten |
L | 50 - Fifty |
C | 100 - One Hundred |
D | 500 - Five Hundred |
M | 1,000 - One Thousand |
SS | 1/2 – Half |
If one or more letters are placed after another letter of greater value, add that amount. | Example: X V I = (10 +5 +1) |
If a letter of lower value is placed before another letter of greater value, the lower value is subtracted from the higher value. | Example: I X = (10 - 1) |
First look for and do the subtractions, then add together the remaining values. | Example: C L X I V Subtractions first = C L X + (I V) Add remaining values = C L X + (4) Translated = 100+50+10+(4) Answer = 164 |
A letter can only repeat three times. | For example the number 8 is VIII, and the number 9 is IX. (Not VIIII) Another example: the number 30 is XXX, and 40 is XL. (Not XXXX) |
V, L and D are never subtracted or repeated. |