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Codage de l'information Cheat Sheet (DRAFT) by

This is a draft cheat sheet. It is a work in progress and is not finished yet.

notation positi­onnelle

un nombre s’écrit comme suit
x = a_{n}a­_{n­-1}...a­_{­1}a_0

Bases de numération

b = 10
b = 2
b = 8
b = 16

Opérations binaire

0 * 0
=
0
0 * 1
=
0
1 * 1
=
1
1 - 0
=
1
1 - 1
=
0
0 - 1
=
1 (avec retenue de 1)
0 + 0
=
0
0 + 1
=
1
1 + 1
=
0 (avec retenue de 1)
 

Passage d'une base b en base 10

(aaaaa­aaaaa)b = 0SUMN aibi
Exemple
2 1 0 = i
8 8 8 = b
(625)8 =