Memory Aid for Roman NumeralsDate: 05/10/2000 at 18:54:40 From: MLC Subject: Roman Numerals What number is XLIII? I need the standard version. Also, do you have a way of remembering what letter equals what number? Date: 05/11/2000 at 02:01:24 From: Doctor Jesse Subject: Re: Roman Numerals The simple rules for Roman numerals: I = 1 V = 5 X = 10 L = 50 C = 100 D = 500 M = 1000 To translate Roman numerals to Arabic numerals (the ones we use), follow this simple rule: If a smaller numeral comes before a larger numeral, subtract the small one from the large one. Otherwise, just add up the numbers. So: VII = 5 + 1 + 1 = 7 CLXIII = 100 + 50 + 10 + 1 + 1 + 1 = 163 But: IX = (10 - 1) = 9 XLV = (50 - 10) + 5 = 45 Based on that info, you should be able to figure out your number, XLIII. Good luck! PS: Here's a memorization tip: Most people can remember the values for I, V, and X. L, C, D, and M are harder to remember. An easy way is to remember the name of the famous Vietnamese cow: Elsie Diem. If you can remember that, you will always remember L-C-D-M! I know it's corny, but it works! - Doctor Jesse, The Math Forum http://mathforum.org/dr.math/ |
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