Converting from Hindu-Arabic Numerals to Roman NumeralsDate: 05/18/99 at 14:59:06 From: Debbie Whittington Subject: Roman Numerals I need to know the conversion for Roman numerals from our number system. I have searched in my local library, and on the Internet, but I can't seem to find an anwser. Thanks, littledeb. Date: 05/18/99 at 16:43:27 From: Doctor Rick Subject: Re: Roman Numerals Hi, Debbie, Here is how I convert our Hindu-Arabic numerals to Roman numerals. Convert one digit at a time. Each digit is converted the same way, except that the symbols are different: 1s digit: I for 1, V for 5 10s digit: X for 1 (10), L for 5 (50) 100s digit: C for 1 (100), D for 5 (500) 1000s digit: M for 1 (1000), nothing for 5 (5000) -- see below. These are the conversions for each digit: 1000s 100s 10s 1s -------------------------------------------------- 0 = nothing 0 = nothing 0 = nothing 0 = nothing 1 = M 1 = C 1 = X 1 = I 2 = MM 2 = CC 2 = XX 2 = II 3 = MMM 3 = CCC 3 = XXX 3 = III 4 = MMMM 4 = CD 4 = XL 4 = IV 5 = nothing 5 = D 5 = L 5 = V 6 = nothing 6 = DC 6 = LX 6 = VI 7 = nothing 7 = DCC 7 = LXX 7 = VII 8 = nothing 8 = DCCC 8 = LXXX 8 = VIII 9 = nothing 9 = CM 9 = XC 9 = IX Put the symbols from each digit together in the same order as they were in our (Hindu-Arabic) numeral system -- from left to right, largest to smallest. For example, let's convert 1999: 1000 => M 900 => CM 90 => XC 9 => IX ------- MCMXCIX Notice that the system I just described only goes up to 4,999. Actually, sometimes you will see a symbol with a bar over it to represent 1000 times the usual value of a symbol. Thus, _ _ _ V = 5000 X = 10,000 L = 50,000 ... But I think it's unconventional to have symbols with bars to the right of symbols without, or to intersperse them, as in _ _ _ 4000 = MV 9000 = VMV Instead, the barred numbers should be a solid block to the left of the unbarred numbers. You can write: _________ 3,859,429 = MMMDCCCLV MMMMCDXXIX You can find more information about Roman numerals -- including the news that the rules I just gave you have been broken frequently over the years -- at these Web sites: Roman numeral Date Conversion Guide http://www2.inetdirect.net/~charta/Roman_numerals.html Roman numerals -- History and Use http://www.deadline.demon.co.uk/roman/intro.htm - Doctor Rick, The Math Forum http://mathforum.org/dr.math/ |
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