Q:

How do I read Roman numerals?

A:

Quick Answer

In order to read Roman numerals, make sure to know what each symbol means, when numbers add or subtract, and how to handle somewhat-larger numbers.

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How do I read Roman numerals?
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Full Answer

  1. Know each symbol

    In Roman numerals, M equals 1,000, D equals 500, C equals 100, L equals 50, X equals 10, and I equals one.

  2. Add numbers when bigger is followed by smaller

    When a larger number is followed by a smaller number, such as XI, the numbers are added. Thus, XI = 10 + 1 = 11.

  3. Subtract numbers when smaller is followed by bigger

    When it is the opposite, such as IX, the smaller number is subtracted from the bigger number. So, IX = 10 - 1 = 9.

  4. Use only three of the same symbol together

    When using multiple numbers of the same value, no more than three of the same symbol should appear together. If four are needed, it should be that value subtracted from the next-largest value. Examples include XL = 40, IV = 4 and CD = 400.

  5. Add a bar on top if multiplying by 1,000

    For each value above one, placing a bar or vinculum above the number multiplies it by 1,000. For instance, an X with a vinculum is 10,000.

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Related Questions

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    A:

    The Roman numerals for one to five are I, II, III, IV and V. The Roman numeral system assigned number values to certain letters in the Roman alphabet. By combining these letters according to their own placement rules and applying simple arithmetic, the ancient Romans were able to represent a large range of numbers.

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    What is 666 in Roman numerals?

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    The number 666 is written as DCLXVI in Roman numerals. The letters stand for 500, 100, 50, five and one respectively. There are only seven symbols in Roman numerals.

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