Roman numbers table
Table shows basic Roman numbers (I, II, III, V, X, M, C etc.) and corresponding Arabic numbers.

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# Roman numbers

 Arabic number Roman number 1 I 2 II 3 III 4 IV 5 V 6 VI 7 VII 8 VIII 9 IX 10 X 20 XX 30 XXX 40 XL 50 L 60 LX 70 LXX 80 LXXX 90 XC 100 C 200 CC 300 CCC 400 CD 500 D 600 DC 700 DCC 800 DCCC 900 CM 1000 M 1500 MD 2000 MM 3000 MMM 4000 MMMM 5000 V 10 000 X 50 000 L 100 000 C 500 000 D 1000 000 M

# Some facts

• Numbers written in the Roman system consist of 7 letters: I(1), V(5), X(10), L(50), C(100), D(500), M(1000).
• In the basic version, the maximum Roman digit (M) has the value of 1000. However, sometimes overline is used to multiply digit value by 1000.
• To read the value of the Roman number we count value of digits from left to right, following the rule below:
• if the current number is the same or greater than the next one, then we add it to the result value (e.g. XI gives 10 + 1 = 11),
• if the current number is smaller than the next one, then we subtract it (e.g. IX gives 10 - 1 = 9).
• Despite the spread of the Arabic system, Roman numerals can still be found in some traditional applications, e.g.
• century numeration e.g. XXI means 21st century,
• sometimes dates e.g. in cinematography or to mark date of building construction e.g. MMXVIII (2018),
• names of rulers, e.g. Louis XVI, John Paul II,
• names of historical events, e.g. World War II,
• sometimes chapters numbering in books,
• months numbering, e.g. 31.XII.2018 (31 December 2018).

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