Roman numeral system (Roman Numeral)Approx. 300 – 100 years ago; The Romans brought the book, green alter is a Roman numeral kama which Roman numeral symbols 7 basis, the following:I = 1, V = 5, X = 10, L = 50, C = 100, D = 500, M = 1000Principles of writing a Roman numeral represents the number1. for each symbol, write no more than 3 consecutive.2. write using consecutive increase in descending order, for example,5 + 1 = 6 .......VI instead........XV instead of 10 + 5 = 15.......DCLXIII instead of 500 + 50 + 100 + 10 + 3 = 663.3. apply the principles of reducing numbers by writing less in front of lot numbers, such as.5 – 1 = 4 ........IV instead.10-1 = 9 ........IX instead.........XL instead of 50 – 10 = 40....... Conduct careful• The number is deleted, there are 3 options I, X, C is.• I will be in front of the X or V only.•X is located in front of L or C only.•C to next M or D only.4. a large number of valuable writing, use the tick mark (-) on the symbol V, 6 a base is X, L, C, D, M.By this new symbol is a 1000 times its original numbers.
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