**What is Roman Numerals?**

Math

Roman numerals is the number system . This numeric system is used in History. This number system is used in a ancient Rome and it written by combinations of letters from the Latin alphabet that signify values.In history time Roman numerals are expressed by letters of the alphabet and but today are rarely used in some special sector except for formality or variety. There are some of four basic Rules for reading Roman numerals.

### Roman Numeral

In Roman numeral some numeral are One or more letters placed after another letter of greater value increases the greater value by the amount of the smaller (XV = 15, XVI = 16, XVII = 117, or LXV = 65, LXVI = 66, LXVII = 67, etc.).

In Roman numerals are letter repeated once or twice repeats it’s value that many times (XXX = 30, CC = 200, etc.).

A letter placed before another letter of greater value decreases the greater value by the amount of the smaller (V = 5, XL = 40, M = 100, etc.).

### Roman Numerals Details

The system is based on seven different symbols. This seven symbols are,

Symbol | Value |

I | 1 |

V | 5 |

X | 10 |

L | 50 |

C | 100 |

D | 500 |

M | 1000 |

Numbers are formed by combining symbols together and adding the values. Means we assign a number by combining of roman symbol together.

### The system of Addition Roman Numerals

In this system a letter placed after another of greater value adds (thus XVII or xvii is 17).

### The system of Subtraction Roman Numerals

Whereas a letter placed before another of greater value subtracts (thus XC is 90).

Zero (0)

The number zero does not have its own Roman numeral, but the word null (the Latin word meaning “none”) was used by medieval composts in lieu of 0.

### Roman Numeral Symbols

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