As we have seen there are many things important in our topic.        

- Hexadecimal is base 16.Base 16 is where the 'numbers' you can use are zero through to the letter F (0123456789ABCDEF).

- You must write the symbol to know the system is the number .ex (3E)HEX or 16.

- convert a hexadecimal number to decimal number.( convert a hexadecimal number to binarynumber after this convert to decimal number).


at the end I give you many questions and answer in the comment .

-What is the important in this table ?
- what did you learn of this topic ?
-What is the important in our lesson?
-What does mean hexadecimal numbers ?
-What do you know about Convert  hexadecimal numbers  ? 
 


-
 
There are a couple of methods of doing so.

One is to use a sign bit,
where the MSB represents the sign (1 meaning negative.  Thus 01 would represent
+1 and 81 would represent -1 for two digit Hex numbers

Another is two's
complement.  Here you invert all the bits and then add 1 to the result.  thus 01
still represents +1 and FF represents -1.

The advantage of two's
complement is that it is easy to do with logic gates, and gives a result that
you can add directly. For example, FF + 01 =00 (ignoring the carry) 

other examples:
0C + FA = 07 (12 + (-5) = +7)
05 + F3 = F9
(5+(-12) =-7)


Now you know negative hexadecimal numbers.

how would you convert a negative number into a hexadecimal format?
 
There are two other number systems that are used in conjunction with binary; they are called octal and hexadecimal.If a programmer was writing or reading code they would use octal and hexadecimal as a shorthand way of representing binary numbers, because binary numbers can be long, confusing and difficult to read.Octal is base 8, uses the characters 0 to 7 and when using it, binary values are interpreted in groups of three. Hexadecimal is base 16, uses the characters 0 to 9 and A to F and when using it, binary values are interpreted in groups of four.
It is important to state that computer systems can only understand binary. Octal and hexadecimal are used because it is easier to convert binary to and from octal and hexadecimal than decimal.
The following table shows all four number systems together, decimal, octal, hexadecimal and binary. The yellow highlighted sections show the octal grouping.



This is table show us the different between Decimal number , Binary
number Octal number and Hex Numbers .
  
         

Now you know different between Decimal number , Binary number Octal
number and Hex Numbers .


There is tow questions pleas answer in the comment .

- what is the different between Decimal number , Binary number Octal
number and Hex Numbers ?
- What is the important in this table ?
  


  

                                                
 
     Hexadecimal describes a base-16 number system.  That is, it describes a
numbering system containing 16 sequential numbers as base units (including 0)
before adding a new position for the next number.  (Note that we're using "16"
here as a decimal number to explain a number that would be "10" in hexadecimal.)
  The hexadecimal numbers are 0-9 and then use the letters A-F.  We show the
equivalence of binary, decimal, and hexadecimal numbers in the table below.
Hexadecimal is a convenient way to express binary numbers in modern computers in which a byte is almost defined as containing eight binary .  When showing the contents of
computer storage (for example, when getting a core of storage in order to debug a new computer program or when expressing a
string of tex charact or a string of binary values in coding a program or HTML page), one hexadecimal digit can represent the arrangement of four binary digits.  Two hexadecimal digits can represent eight binary digits, or a byte.


Now you know the definition hexadecimal numbers.

There is tow questions pleas answer in the comment  

Write the definition hexadecimal numbers?
What is the important in hexadecimal numbers?
  






 
Refers to the base-16 number system, which consists of 16 unique symbols: the numbers 0 to 9 and the letters A to F. 

For example, the decimal.
number 15 is represented as F in the hexadecimal numbering system. The
hexadecimal system is useful because it can represent every byte
(8 bits) as two consecutive hexadecimal digits. It is easier for humans to read
hexadecimal numbers than binary numbers.
To convert a value from hexadecimal to binary, you merely translate each hexadecimal digit
into its 4-bit binary equivalent. Hexadecimal numbers have either an
0xprefix or an hsuffix. For example, the hexadecimal number 0x3F7A translates to the following binary number :  0011 1111 0111 1010 .


Now it is easy to describe hexadecimal numbers 

Pleas answer this question .  
 
- describe hexadecimal numbers ?



 

This video talks about how to hexadecimal numbers to decimal number.

This is question about what you have seen in video .

- How to Convert  hexadecimal numbers to decimal numbers ? 
- why  to Convert  hexadecimalnumbers to decimal numbers  ?





 
    hexadecimal is an online tool specially programmed to perform the computations of Hex to Binary Conversion, Hex to Decimal Conversion and Hex to Octal Conversion. This Hex calculator converts the given Hex input values into equivalent Decimal, Binary, and Octal values.

    In digital electronics the number conversion is more essential to designing a
circuit. In mathematics and computer science, Hex also called as base 16 or hex
is a positional numeral system with a radix, or base, of 16. It uses sixteen
distinct symbols, most often the symbols from 0 to 9 to represent values zero to
nine, and A, B, C, D, E, F or alternatively from alphabet A to F to represent
values ten to fifteen. More common the Hex values are used to represent computer
memory size.


Now you can convert to decimal numbers.

you have this question you can answer in the comment .

- What is the different between  hexadecimal numbers and decimal numbers ?  




 
   Each hexadecimal digit represents four binary digits, and the primary use of hexadecimal notation is a human-friendly representation of values in computing and digital electronics.
   One hexadecimal digit represents a  which is half of an octet .For example the values can range from 0 to 255, but may be more conveniently represented as two hexadecimal digits in the range 00 to FF. Hexadecimal is also commonly used torepresent computer .

    The other major numbering system used by computers is hexadecimal , or Base 16. In this system, the numbers are counted from 0 to 9, then letters A to F before adding another
digit. The letter A through F represent decimal numbers 10 through 15, respectively. The below chart indicates the values of the hexadecimal position compared to 16
raised to a power and decimal values. It is much easier to work with large
numbers using hexadecimal values than decimal.



This is picture show  hexadecimal numbers and decimal and binary numbers 
  Now you have a good information about  How to Convert  hexadecimal numbers.

There is one question about How to Convert hexadecimal numbers.

- Convert hexadecimal numbers to decimal numbers ?  

  
 


 
   In this video you will get some information about the lesson. The video focuses on the key aspect of how to convert hexadecimal numbers to decimal numbers. As we have discussed in the lecture, this is very improtant for you to know.

This is video  to explain how to convert hexadecimal
numbers


After waching this video you now know how to convert a hexadecimal number to decimal number.

Make sure you come back regularly to see more information about this area.

Now I will give you two question and answer this  in comment

- What do you know about Convert  hexadecimal numbers ?
- Explain how to convert hexadecimal numbers ?


  

 
Hexadecimal
The Hexadecimal, or base 16 number system is important to programmers because
it's a shorthand way of writing out and inputting binary values. It's simpler
and easier because you can work with fewer symbols, or "numbers". In this 
 In this table you will learn the numbering systems .
Now you know the number of sestems
 
There is tow questions pleas answer in the comment
  
What does mean hexadecimal numbers ?
 What does mean binary  number ?

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    Mousa Salem AlQahtani
    202323203
    Tareq Hassan Faraji
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    Talal Khalaf Almalki
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