Bonsoir ! J'espère vous aider !
Réponse :
Calculer les expressions suivantes.
Légende : souligné = barré
A = - 2/21 * 14/5 - 8/5
A = - 28/105 - 8/5
A = - 7*4/7*15 - 8/5
A = - 4/15 - 8/5
A = - 4/15 - 8*3/5*3
A = - 4/15 - 24/15
A = - 28/15
B = 1/4 + 5/3 * - 1/8
B = 1/4 - 5/24
B = 1*6/4*6 - 5/24
B = 6/24 - 5/24
B = 1/24
C = 4/- 3 + - 7/6 * - 2/5
C = - 4/3 + 14/30
C = - 4/3 + 7*2/15*2
C = - 4/3 + 7/15
C = - 4*5/3*5 + 7/15
C = - 20/15 + 7/15
C = - 13/15
D = (8/15 - 7/5) * (- 1/6 + 2/9)
D = (8/15 - 7*3/5*3) * (- 1*3/6*3 + 2*2/9*2)
D = (8/15 - 21/15) * (- 3/18 + 4/18)
D = - 13/15 * 1/18
D = - 13/270
