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Roman numerals use letters I, V, X, L, C, D, M to represent values 1, 5, 10, 50, 100, 500, 1000. They appear on clock faces, film copyright dates, Super Bowls, and building cornerstones.
Wzór
I=1, V=5, X=10, L=50, C=100, D=500, M=1000; smaller before larger = subtract
- n
- Decimal Number (integer)
- R
- Roman Numeral (text)
Przewodnik krok po kroku
- 1I=1, V=5, X=10, L=50, C=100, D=500, M=1000
- 2Smaller value before larger = subtraction (IV=4, IX=9)
- 3Smaller value after larger = addition (VI=6, XI=11)
- 4No numeral appears more than 3 times consecutively
Rozwiązane przykłady
Wejście
2024
Wynik
MMXXIV (2000+20+4)
Wejście
MCMXCIX
Wynik
1999 (1000+900+90+9)
Często zadawane pytania
Why do Roman numerals still exist?
Roman numerals appear in formal documents, clocks, book chapters, and movie copyright dates. They're recognized as elegant formal notation.
How do I know if a numeral like IV is subtraction?
When a smaller value appears before a larger value, it's subtraction: IV=4, IX=9. When larger is first, it's addition: VI=6, XI=11.
What's the largest Roman numeral?
Romans didn't have a zero or symbol for infinity. Vinculum (overline) multiplies by 1000: V̄ = 5000. Modern system stops at practical numbers.