**Mathematics means numerology.There are three types of digitization systems implemented worldwide.**

**Decimal method**: based on 10, the method of digits from 0 to 9 is called decimal method. This method originated in India. Indians are the ones who find zero.

**Roman method: **It is based on English letters.

**Binary method method: **this method is used in electronic and computer apparatus. In this method only the digits 0 and 1 are use

**Addition: **The sum of digits or numbers is called as addition.

**Subtraction: **The difference of two or two numbers is called as subtraction.

**Multiplication:**

**Division:**