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If a symbol is repeated, its value is added as many times as it occurs.The following rules determine the way the numbers are written in the Roman numeral system. Roman numerals are usually written in order, from largest to smallest and from left to right, but more than three identical symbols never appear in a row. Rules that define the Roman Numeral System How can these seven numerals be used to write different numbers? Certain rules define the writing of numerals under the Roman numeral system. The following is the relation between the Roman Numerals and the Hindu-Arabic Numerals Roman Numerals So how do we use these symbols to form values in this system? Relation between Roman Numerals and Hindu-Arabic Numerals

These symbols are I, V, X, L, C, D and K. Similarly, there are 7 distinct symbols that form the entire Roman numeral system. We know that in the Hindu-Arabic numeral system we have 10 distinct digits that form the entire numeral system, namely, 0, 1, 2, 3, 4, 5, 6, 7, 8 and 9.

The Distinct Symbols in Roman Numerals System Around 1300 A.D, the Roman numerals were replaced throughout most of Europe with the more effective Hindu-Arabic system that is still in use today. As the Romans conquered much of the world that was known to them, their numeral system spread throughout Europe, where Roman numerals remained the primary manner for representing numbers for centuries. The Roman numeral system for representing numbers was developed around 500 B.C. Although the Roman numeral system provided for easy addition and subtraction, other arithmetic operations proved more difficult. The Roman numeral is an additive and subtractive system in which letters are used to denote certain base numbers and arbitrary numbers in the number system. They are a special kind of numerical notations that were earlier used by the Romans. For example, we can see its use in the numbering of different volumes or parts of books, chapter numbers, numbers of issues of magazines, numbers on clock faces, etc. The Roman numeral system is one of the early numeral systems that are still in use today in many places. One of the early systems on numeration still in common use today was developed by Romans and is called Roman numerals systems. Therefore, these are called Hindu-Arabic numerals systems. These numbers are Indian in origin and the Arabs picked them up and spread to Europe. The numerals 0, 1, 2, 3 are used in writing numbers.