bonjour,c pour un dm de math... A= -2/3-7/6 B= -5/2+1/3 C= -5//9 diviser 7/2 D= - 7 fois (-5/4) E= -2/7+5 fois(-3/5) F=(2-5/2)diviser(5/4 je comprend rien svp a

Bonsoir

A= -2/3-7/6

A = (- 2 x 2) / (3 x 2) - 7/6

A = - 4/6 - 7/6

A = - 11/6

B= -5/2+1/3

B = (- 5 x 3) / (2 x 3) + (1 x 2) / (3 x 2)

B = - 15/6 + 2/6

B = - 13/6

C= -5//9 diviser 7/2

C = - 5/9 x 2/7

C = - 10/63

D= - 7 fois (-5/4)

D = 35/4

E= -2/7+5 fois(-3/5)

E = - 2/7 - 15/5

E = - 2/7 - 3

E = - 2/7 - (3 x 7) / (1 x 7)

E = - 2/7 - 21/7

E = - 23/7

F=(2-5/2)diviser(5/4)

F = [(2 x 2) / (1 x 2) - 5/2) x 4/5

F = (4/2 - 5/2) x 4/5

F = - 1/2 x 4/5

F = - 4/10

F = (2 x - 2) / (2 x 5)

F = - 2/5.

Hey !

A = - 2 / 3 - 7 / 6

A = (- 2 × 2) / (3 × 2) - 7 / 6

A = - 4 / 6 - 7 / 6

A = - 11 / 6

B = - 5 / 2 + 1 / 3

B = (- 5 × 3) / (2 × 3) + (1 × 2) / (3 × 2)

B = - 15 / 6 + 2 / 6

B = - 13 / 6

C = - 5 / 9 ÷ 7 / 2

C = - 5 / 9 × 2 / 7

C = - 10 / 63

D = - 7 × (- 5 / 4)

D = 35 / 4

E = - 2 / 7 + 5 × (- 3 / 5)

E = - 2 / 7 - 15 / 5

E = (- 2 × 5) / (7 × 5) - (15 × 7) / (5 × 7)

E = - 10 / 35 - 105 / 35

E = - 115 / 35

E = (- 23 × 5) / (7 × 5)

E = - 23 / 7

F = (2 - 5 / 2) ÷ (5 / 4)

F = (4 / 2 - 5 / 2) ÷ (5 / 4)

F = (- 1 / 2) ÷ (5 / 4)

F = (- 1 / 2) × (4 / 5)

F = - 4 / 10

F = (- 2 × 2) / (5 × 2)

F = - 2 / 5

Bonne journée.