Enchainement d'opérations 56 Calculer mentalement chaque expression. A=-3-2x(-4) B=-6:2 + 10 C=-5x3+ (-12):(-3) D=9x (5 - 7) E=-11-2x 15 F= 15 + 5 x (-3) bo.jou

Bonsoir,

Calculer mentalement chaque expression.

A=-3-2x(-4)

A = - 3 + 8

A = 5

B=-6:2 + 10

B = (- 3) + 10

B = 7

C=-5x3+ (-12):(-3)

C = - 15 + 4

C = - 11

D=9x (5 - 7)

D = 9 x (- 2)

D = - 18.

E=-11-2x 15

E = - 11 - 30

E = - 41

F= 15 + 5 x (-3)

F = 15 - 15

F = 0.

bonjour

A = - 3 + 8 = 5

B  =   - 3 + 10 =  7

C =   - 15 + 4  =  - 11

D = 9 *  ( - 2 ) = - 18

E = - 11 - 30 = - 41

F = 15  - 15 = 0