Réponse :
Explications étape par étape
Bonjour
Effectuer les calculs puis simplifie lorsque cela est possible ( donne au moins une étape intermédiaire dans le calcul)
A= 3+3/2
A = (3 x 2)/2 + 3/2
A = 6/2 + 3/2
A = 9/2
A = 4,5
B= -5/21-7/3
B = -5/21 - (7 x 7)/(3 x 7)
B = -5/21 - 49/21
B = -54/21
B = (-3 x 18)/(3 x 7)
B = -18/7
C=7/8- -5/3
C = 7/8 + 5/3
C = (7 x 3)/(8 x 3) + (5 x 8)/(8 x 3)
C = 21/24 + 40/24
C = 61/24
D=1/8+5/4+ -7/6
D = (1 x 3)/(3 x 8) + (5 x 6)/(4 x 6) - (7 x 4)/(6 x 4)
D= 3/24 + 30/24 - 28/24
D = 33/24 - 28/24
D = 5/24
E=3+ -7/5-17/20
E = 3 - 7/5 - 17/20
E = (3 x 20)/20 - (7 x 4)/(5 x 4) - 17/20
E = 60/20 - 28/20 - 17/20
E = 60/20 - 45/20
E = 15/20
E = (3 x 5)/(4 x 5)
E = 3/4
F=7/4- ( -1/8-3/10)
F = 7/4 - [(1 x 5)/(8 x 5) - (3 x 4)/(10 x 4)]
F = 7/4 - (5/40 - 12/40)
F = (7 x 10)/(4 x 10) - (-7/40)
F = 70/40 + 7/40
F = 77/40