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* I is one * V is five * X is ten * L is fifty * C is one hundred * D is five hundred * M is one thousand Use multiples of each place to indicate larger numbers. So 30 is "three tens", or XXX. And add any remainder, so that 32 is "three tens plus two", or XXXII.

Some people prefer to write the fourth multiple as "one less than" the next highest place, so 40 is not "four tens" (XXXX) but rather "ten less than fifty", written as "XL". You can also choose to write 40 as XXXX. Either way is technically correct.

4100 in Roman numerals would be "MMMMC". Sometimes a line is used over a digit to indicate "a thousand times this", so a V with a horizontal line over it would mean "a thousand fives" or 5000. Thus you could write 4100 as "MVC" with a horizontal line over the V. You would read this as "one thousand less than five thousands, plus one hundred".

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15y ago

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