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Sagot :

KIARABARDIES2
Exercice 3 :

A = 20
B = - 24
C = - 11
D = 75
E = 72
F = 10

Exercice 4 :

A = - 5
B = 2
C = - 5
D = 3,2
E = 12,5
F = - 9

Exercice 5 :

A= - 46
B = 7
C = - 12
D = 3

Réponse :

Explications étape par étape

Bonjour,

exercice 3

-5*-4 = 20

-3*8 = -24

5,5 * -2 = -11

-7,5 *-10 = 75

8*9 = 72

-2,5 *-4= 10

règle des signes

-*-=+

+*+ =+

-*+ = -

Exercice 4

15/ -3 = -5

-14/-7 = 2

-25/5 = -5

-12,8 /-4 = 3,2

-25 /-2 = 12,5

54/-6 = - 9

Règle des signes:

-/- = +

+/+ = +

-/+ = -

+/- = -

exercice 5

5+9 - (32+18 +10 )=  14 - 60 = -46

3-(-4) = 3+4 = 7

-10  +6 -8 = -12

8  -7+2 =3

règle des signes

-(-) =+

-(+) => -

+(+) => +

+(-) => -

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