Chapter 2 Number Bases

A number base is the number of digits or combination of digits that a system of counting uses to represent numbers. A base can be any whole number greater than 0. The most commonly used number system is the decimal system, commonly known as base 10

For example, 

Meanwhile, we can change the number bases differently... here is the example 

Magic Number 421

Base 2 <----> Base 8

Addition and Subtraction in Binary

Key Addition Results for Binary Numbers
1	+	0	=	1
1	+	1	=	10
1	+	1	+	1	=	11
Key Subtraction Results for Binary Numbers
1	–	0	=	1
10	–	1	=	1
11	–	1	=	10

Addition and subtraction in binary 

 

Addition and subtraction in other bases number