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7)1. Calculer les expressions suivantes.
A = 1-2x (+6) B = (-5) x (+7)
C = (-2) x (-5) D = (+6) x (+7)
E = (-2) (+7) F = (-5) x (+6)
2. Calculer les produits AXB, C D et ExF
Que remarque-t-on ? Expliquer.

Sagot :

CKELENC

Salut !

Réponses :

1. A = 1-2 x (+6) = -6

B =(-5) x (7) = -35

C = -2 x (-5) = 10

D = 6x7 = 42

E = -2 x 7 = -14

F = -5 x 6 = -30

2.  -6 x (-35) = 210

10 x 42 = 420

-14 x (-30) = 420

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