Bonjour! Exercice n°2 Calculer les expressions ci-dessous en respectant les règles de priorité et en notant les étapes de calcul. U = 4 + 5 (-2) V=-4+ (2-6): 2

Bonjour,

U = 4 + 5 (-2)

=   9-2 = 7

V=-4+ (2-6)/ 2

= -4 +(-4)/2

= -4 -2 = -6

T = 9-7x (-4)=

9+ 28 = 37

X= 2 (-4) - 1

= -8 -1 = -9

Y=-12-(-1) × (-2)

= -12 - (+2)

= -12 -2 = -14

Z= 10 - 5 × (-2 +3 - 6) - 4

= 10 -5( -5) -4

= 10 +25 -4 = 31

dans l'ordre:

- parenthèses

- multiplication ou divisions

- additions et soustractions

Réponse:

U = 4 + 3

= 7

V = - 4 + (-4) ÷2

= - 4 - 2

= - 6

T = 9 + 28

= 37

X = - 2 - 1

= - 3

Y = -12 +1 + (-2)

= - 11 - 2

= - 13

Z = 10 + [ (-5) × (-2) + (-5) × 3 + (-5) × (-6) ] - 4

= 10 + (10 - 15 + 30) - 4

= 10 + (-5 +30) - 4

= 10 + 25 - 4

= 10 + 21

= 31

Voilà :)