The generally accepted notation for numbers in the world is Arabic numerals. However, for some purposes, along with Arabic numerals, Roman numerals are also used. A person unfamiliar with this entry may have questions about how to write the number in Roman numerals.
Instructions
Step 1
In Roman notation, seven designations are used: I - 1, V - 5, X - 10, L - 50, C - 100, D - 500, M - 1000. The number is written using combinations of Roman numerals, which can be repeated, but not more three in a row. There are two principles that determine the rules for writing numbers using Roman numerals. Addition principle: if there is a smaller one behind the larger digit, then their addition is carried out. Subtraction principle: if there is a larger one behind the smaller digit, then the smaller one is subtracted from the larger digit. This principle is used to ensure that the same Roman numeral is not repeated more than three times.
Step 2
To correctly write a number using Roman numerals, first write down thousands, then hundreds, then tens, and finally ones. For example, the Roman notation for 1989 would look like this: MCMLXXXIX. One thousand is M. Nine hundred is CM (the smaller C, which stands for 100, comes before the larger M, which stands for 1000, respectively 1000 - 100 = 900). Eight tens - LXXX (L, denoting 50, is added to three Xs, each of which denotes 10, respectively, 50 + 30 = 80). Nine - IX (the lesser I, denoting 1, comes before the greater X, denoting 10, respectively, 10 - 1 = 9). All numbers are written according to this principle.
Step 3
For computer recording of Roman numerals, standard Latin letters are usually used. This entry is recommended by the Unicode standard. However, this standard also contains characters intended directly for writing Roman numerals. They are part of the Numeric Forms section. The range of codes reserved for the recording of Roman designations is from U + 2160 to U + 2188. However, these characters can only be displayed if the computer has Unicode software and a font that has Roman numeral glyphs.
