About this worksheet
Roman numerals use seven letters: I = 1, V = 5, X = 10, L = 50, C = 100, D = 500, M = 1,000. A smaller letter after a bigger one is added (VI = 6); a smaller letter before a bigger one is subtracted (IV = 4).
Tips for parents and teachers
- A letter is repeated at most three times: III is 3, but 4 is IV, not IIII.
- V, L and D are never repeated and never subtracted.
- Only I, X and C are used for subtracting: IV, IX, XL, XC, CD, CM.