Réponse :
Explications étape par étape
Bonjour
Effectuer les calculs :
A = 1 - 5/2 : 15/4
A = 1 - 5/2 x 4/15
A = 1 - 5/15 x 4/2
A = 1 - 1/3 x 2
A = 1 - 2/3
A = 3/3 - 2/3
A = 1/3
B = 9 x 3/2 - 10
B = 27/2 - 10
B = 27/2 - 20/2
B = 7/2
B = 3,5
C = 7/8 - 3/4 x 20/9
C = 7/8 - 20/4 x 3/9
C = 7/8 - 5 x 1/3
C = 7/8 - 5/3
C = 21/24 - 40/24
C = -19/24
D = 15/49 x 28/35
D = 15/35 x 28/49
D = (3 x 5)/(5 x 7) x (7 x 4)/(7 x 7)
D = 3/7 x 4/7
D = 12/49
E = 6/7 - 4/7 : 2/5
E = 6/7 - 4/7 x 5/2
E = 6/7 - 20/14
E = 12/14 - 20/14
E = -8/14
E = -4/7
F = (3 - 1/7)(2/5 + 4)
F = (21/7 - 1/7)(2/5 + 20/5)
F = 20/7 x 22/5
F = 22/7 x 20/5
F = 22/7 x 4
F = 88/7
G = (1/2 + 3/5)/(2 - 13/15)
G = (5/10 + 6/10)(30/15 - 13/15)
G = 11/10 + 17/15
G = 33/30 + 34/30
G = 67/30
H = 5/2 : 25
H = 5/2 x 1/25
H = 5/25 x 1/2
H = 1/5 x 1/2
H = 1/10
