**INTRO**

- hexadecimal (hex) is a number system that has base which is 16.
- use symbol 0 - 9 to represent zero to nine and A - F to represent ten to fifteen.
- hex digit represent 4 binary digit ( bits ) or nibble.
- hex has 2 operation which are addition and subtraction.

**CAUTION**

never forget to put '16' after write the digit in order to distinguish between ordinary numbers and hex numbers.

**ADDITION**

- hex has 16 digit :-

0,1,2,3,4,5,6,7,8,9,A,B,C,D,E,F = 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15

- if the sum is 16, carry '1' will move to the next digit

example of addition for hexadecimal number |

**SUBTRACTION**

- it follow the following rules :-

- convert to binary numbers
- find 2nd complement
- add
- convert to hex
- drop carry (if have)

- if the value is smaller, 'borrow' from the next digit (same as primary school's subtract operation)

some examples for subtraction for hexadecimal number |

__below is a video showing us how to make both hex addition and subtraction operation__

that's all from me

wait for another entry

hope that this will help........

p/s = practice make perfect!

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