What is xx?

XX in roman numeral is equivalent to 20.

Basic rules for writing Roman Numerals:

When a symbol appears after a larger symbol it is added

Example: VI = V + I = 5 + 1 = 6

If the symbol appears before a larger symbol it is subtracted

Example: IX = X - I = 10 - 1 = 9

Don't use the same symbol more than three times in a row.

Numbers greater than 1,000 are formed by placing a dash over the symbol, meaning "times 1,000", but these are not commonly used.

Roman Numerals via kwout

The Roman Numeral Symbols:

See this Numerals Conversion Chart to translate large numbers into Roman Numerals.

Basic Combinations:

Roman Numerals via kwout

Friday, July 08 2016


Source: http://www.mathsisfun.com/roman-numerals.html

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