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Ordonner les étapes de traduction des nombres négatifs suivants : (2Pts

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Evaluation N° 2 Niveau : 2AC…… GR :………

Année Scolaire : 2016/2017 1er Semestre Le : 16/01/2017 Nom & Prénom:……… Matière : Informatique Durée : 45 mn

I. Ordonner les étapes de traduction des nombres négatifs suivants : (2Pts)

…… Permutation des bits ;

…… Additionner le chiffre 1 au résultats obtenu ;

…… Ajouter des 1 à gauche.

…… Faire des divisions successives par 2 ;

…… Lecture des restes ;

II. Permuter les nombres suivants : (1,5Pts)

10101100(2) ……….

11001001(2) ……….

00010100(2) ……….

III. Représenter en octet les résultats de la traduction des nombres négatifs suivants : (1,5Pts)

110110 1001011 11100

IV. Faites les opérations suivantes dans le système binaire (6Pts)

11011011(2) +

10111101(2)

=

01110111(2) +

11001110(2)

=

111111(2) +

111111(2)

= 1011111(2)

_

0011010(2)

=

11001100(2) _

00110011(2)

=

01110111(2) _

11110111(2)

=

V. Relier ce qui va ensemble (4Pts)

100(2) 4(10)

111(2) 6(10)

110(2) 7(10)

001(2) 1(10)

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VI. Convertir les nombres négatifs suivants vers le système binaire : (5Pts)

(-17)10=N(2) ; (-52)10=N(2)

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