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Table Of Contents  CertiGuide to A+ (Core Hardware)
 9  Chapter 0000:  The Start of the PC
      9  VI  Binary Math

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VII  Chapter 0000: Summary
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Hexadecimal (Base 16)
(Page 1 of 2)

Although binary is the way computers communicate on an electronic level, dealing with long strings of ones and zeros is too difficult a task for most human beings. However because of the large numbers that are dealt with in computers, this makes Base10 math unpractical as well. A new form of represent numbers was created based on using 0-9 then, A-F.

The first rule to know about hexadecimal math is that a Base16 digit represents four binary bits.

This makes easy for programmers to represent a byte with two hexadecimal digits. Refer to the chart below to see how Base16 digits are represented in Base10, and Base2.

Table 5: Decimal, Binary and Hexadecimal Equivalents

Base 10
(Decimal)

Base 2
(Binary

Base 16
(Hexadecimal)

0

0000

0

1

0001

1

2

0010

2

3

0011

3

4

0100

4

5

0101

5

6

0110

6

7

0111

7

8

1000

8

9

1001

9

10

1010

A

11

1011

B

12

1100

C

13

1101

D

14

1110

E

15

1111

F


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