How to write Roman numerals

Perhaps, it is difficult to find a keyboard on which the keys instead of Arabic numerals would have been applied Roman. However, to write a Roman numeral you can easily on the keyboard of any computer or laptop.

Instruction

For writing Roman numerals should be used the following letters of the Latin alphabet: I, V, X, L, C, D, M. These letters used for writing integers to Roman numbering. I – 1, V – 5, X – 10, L – 50, C – 100, D – 500, M – 1000.

The numbers of the first dozen will have the following form: I – 1, II – 2, III – 3, IV – 4, V – 5, VI – 6, VII – 7, VIII – 8, IX – 9. Figures 2, 3, 4, and 5 tens will start with a X, XX, XXX, XL and mark 10, 20, 30 and 40 respectively. To write any number from 10 to 50, should be to primary figure (X, XX, XXX, XL) add additional number from the first dozen. For example, the number 16 will be in the form XVI, number 38 will look like XXXVIII, and the number 44 as XLIV.

Since 50 to 90, most of the numbers will start with L. for Example, 57 would be LVII, 73 will be recorded as LXXIII, LXXXIX 89. For writing digits from 90 to 99 as the largest number of 90 use XC and then write the correct number. For example, 95 will look like XCV.

To record any large number, you must first supply a number of thousands, then the hundreds, tens and units. Thus, 3994 will be recorded as MMMCMXCIV, the number 1667 as MDCLXVII, and 572 as DLXXII.

In order to avoid the fourfold repetition of one digit is used the principle of addition and subtraction. So, if after a larger numeral is smaller, they add up, and if the opposite – deductible. Example XXXII: 30+2=32, XIX: 10+10 -1 = 19.

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