# 2.3. COMPUTER ARITHMETIC

No matter in which the system of numbers running and enter data in a digital computer, and what will be the electronic circuits to apply, all operations are carried out in a computer in binary number system the reasons mentioned above. Essentially there is no difference in the process of performing arithmetic operations in the binary system of numbers and the decade (or someone else), because all the rules that apply in the basic arithmetic operations in decade system of numbers apply to the binary number system.

## 2.3.1. Binary arithmetic

Arithmetic operation with binary numbers are simple, only need to be followed mathematical rules, such as:

Binary account 1 + 1 = 10 should be understood as when the decade number system fills ten (baseline), for example 5 + 5 = 10, five over five equals zero, one on. Binary account 11 + 1 = 100 is analogous to the example in decade 45 + 55 = 100.

Example I

Converting decade number 15 and 5 in binary and basic mathematical operations with them:

Analogously given below: