Svp aider je comprends rien et je dois le faire pour demain

Bonjour



A = - 2/3 / 4/3 × 7
A = -2/3 / 28/3
A = -2/3 × 3/28
A = -2/28 = -1/14

B = 2/3/5/6 - 2/5
B = (2/3×6/5) - 2/5
B = 12/15 - 2/5
B = 12/15 - 6/15
B = 6/15 = 2/5

C = (-3/4)+(1/2)/ (2/5)-(5/2)
C = (-3/4)+(2/4)/ (4/10)-(25/10)
C = -1/4 / -21/10
C = -1/4 × 10/-21
C = -10/-84 = 10/84 = 5/42

Voilà ^^

Bonsoir,
A= (-2/3) / (4/3x7)
A= (-2/3) / (28/3)
A= -2/3 x 3/28
A= -6/ 84
A= -1/14
Pareil pour la B

C = [(-3/4)+(1/2)]/ [(2/5)-(5/2)]
C= [(-3/4)+(1*2/2*2)]/ [(2*2/2*5)-(5*5/5*2)]
C= [(-3/4)+(2/4)]/ [(4/10)-(25/10)]
C= -1/4 / -21/10
C= -1/4 x 10/-21
C= -10/-84 
C= 5/42