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.