Réponse:
Bonjour, je suis désolé pour les écritures c'est compliqué quand on ne peut pas faire de fractions.
A= 6/7 - 4/7 × 5/2
A = 6/7 - 20/14
A =) 6 × 2/7 × 2) - 20/14
A = 12/14 - 20/14
A = - 8/20
B = 2/3 - 3/2 × 4/9 + 1/2
B = 2/3 - 12/18 + 1/2
B = (2 × 6 / 3 × 6) - 12/18 + (1 × 9 / 2 × 9)
B = 12/18 - 12/18 + 9/18
B = 9/18
C = (2 - 1/3) ÷ (5 + 5/6 )
C = (2 × 3 / 1 × 3 - 1/3) ÷ (5 × 6 / 1 × 6 + 5/6)
C = (5/3 - 1/3) ÷ (30/6 + 5/6)
C = 4/3 ÷ 35/6
C = 4/3 × 6/35
C = 24/105
C = 8/35
D = 2/5/3 - 7/10
D = 2 × 3/5 - 7/10
D = 6/5 - 7/10
D = 6 × 2 / 5 × 2 - 7/10
D = 12/10 - 7/10
D = 5/10
D = 1/2
E = 24/15 ÷ 36/25
E = 6 × 4 / 5 × 3 ÷ 6 × 6 / 5 × 5
E = 4/3 ÷ 6/5
E = 4/3 × 5/6
E = 20/18
E = 10/9
F = 72/162 ÷ 108/54
F = 2 × 36/54 × 3 ÷ 3 × 36/54
F = 2/3 ÷ 3
F = 2/3 × 1/3
F = 2/9
G= 2/3 - 5/2 + 1 sur 4/5 - 2/3 + 3/2
G = 2 × 2/3 × 2 - 5 × 3/2 × 3 + 1 sur 4 × 6/5 × 6 - 2 × 10/3 × 10 + 3 × 15/2 × 15
G = 4/6 - 15/6 + 1 sur 24/30 - 20/30 + 45/30
G = - 11/6 + 6/6 sur 49/30
G = 5/6 sur 49/30
G = 5/6 × 30/49
G = 150/294
G = 25/49 (en divisant par 6)
Voilà j'espère t'avoir aidé !
