effectuer les calculs en détaillant les étapes : A= 7+(-2)+(+6) B= -1 - (-4) = (-2) C = 9 - 2 x (12 - 4 x 2) D= 4+ ( 21 : 3 - 5 x 2) x ( 4 - 3 x 3)

Bonsoir, 

A = 7 + (- 2) + (+ 6)
A = 7 - 2 + 6
A = 11

B = -1 - (- 4) + (- 2) 
B =  - 1 + 4 - 2
B = 1

C = 9 - 2 x (12 - 4 x 2)
C = 9 - 2 x (12 - 8)
C = 9 - 2 x 4
C = 9 - 8
C = 1

D = 4 + ( 21 / 3 - 5 x 2) x ( 4 - 3 x 3)
D = 4 + (7 - 10) x (4 - 9)
D = 4 + (- 3) X (- 5)
D = 4 + 15
D = 19

bonsoir
A = 7 + (- 2) + (+ 6)A = 7 - 2 + 6A = 11


C = 9 - 2 x (12 - 4 x 2)C = 9 - 2 x (12 - 8)C = 9 - 2 x 4C = 9 - 8C = 1
D = 4 + ( 21 / 3 - 5 x 2) x ( 4 - 3 x 3)D = 4 + (7 - 10) x (4 - 9)D = 4 + (- 3) X (- 5)D = 4 + 15D = 19
bon chance:)