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In accordance with the rules governing the Roman numeral system made up during the Middle Ages and centuries after the Romans had quit England, 999 in Roman numerals is today reckoned to be CMXCIX and half of this would work out as CDXCIXS (499.5)

But in all reality the Romans themselves would have most probably wrote out 999 simply as IM and half of this work's out as SD (-0.5+500 = 499.5)

Note that the Roman numeral for a 1/2 looks like the letter S and its Latin name is 'semis' which means a half.

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14y ago
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1y ago

Half of 999 in Roman numerals is CDXCIX.

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Q: What is half of 999 in Roman numerals?
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I think it is IXIXIX. I checked the Internet and that what I got but hey it might be wrong.Improved Answer:-In accordance with today's rules governing the Roman numerals 999 converted into Roman numerals works out as CMXCIX.But during the Roman era the Romans themselves would have calculated the equivalent of 999 on an abacus counting device as DCCCCLXXXXVIIII and probably simplified it to IM (-1+1000 = 999) in written form.


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Notwithstanding todays modern conversion of 999 into Roman numerals which is now considered to be CMXCIX inasmuch that the ancient Romans would have probably added together the equivalent of 777 and 999 in either of the following formats:- Abridged format: DCCLXXVII+IM = MDCCLXXVI => 777+(1000-1) = 1776 Elongated format: DCCLXXVII+DCCCCLXXXXVIIII = MDCCLXXVI => 777+999 = 1776 QED


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IM in Roman numerals represents 999 (-1+1000).


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