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Roman Numeration System and Common Numerals
About the Roman Numeration System
Numbers weren't always as universal as they seem now. Even today, some Asian countries prefer their own system of writing instead of using the arabic system. Roman numerals were used hundreds of years ago in common life and are still somewhat used today in old-fashioned items suchs as clocks. Before you reach for a roman numeral converter just to get the roman numeral 500, learn that there is a sense to this letter-system of numbers.
Common Roman Numeral Conversion
Arabic to Roman Numeral
- Roman Numeral 500 = D
- Roman Numerals 1000 = M
Roman Numeral Converstion to Arabic
- Roman Numeral IX = 9
- Roman Numeral XLIV = 44
- Roman Numerals XIX = 19
- Roman Numeral XV = 15
- Roman Numerals XVI = 16
And just for a bonus: MMX roman numerals are..... 2010. Which means we currently are in the year MMXI
Roman Numerals 1 - 20
How to do Roman Numeral Conversion?
Well having a roman numeral chart (like above and below) helps! However, once you memorize what they represent it's not that hard. Just remember that it's all about math.
You read from right to left. If a numeral is follow by another smaller than itself, you subtract. Else, you add.
XXIX = 10,10, 1, 10 => (right to left) => 10, 1, 10, 10 => (10,1) , 10, 10 => (10-1) + 10 + 10 = 9 + 10 + 10 = 29
CLIX = 100,50,1,10 => (right to left) => 10, 1, 50, 100 => (10,1),50,100 => (10-1)+50+100 = 9+ 50 + 100 = 159
CMXLIV = 100,1000,10,50,1,5<==> (5,1),(50,10)(1000,100) =>(5-1)+(50-10)+(1000-100)=>4+40+900 = 944
It may look like a lot of math, but with practice you learn to do it without even thinking about it. Once you get good at it, you can even do it by reading left to right and just looking ahead and backtracking.