Réponse :
Bonjour
Explications étape par étape
A = 7/2 + 9/7 : 1/14
A = 7/2 + 9/7 * 14
A = 7/2 + 18
A = 7/2 + 36/2
A = 43/2
B = -9/13 : (-1)/30 * (-13)/17
B = -9/13 * (-30) * (-13)/17
B = (-9 * (-30) * (-1))/17
B = -270/17
C = -2/9 + 13/3 - (-5)/18
C = -4/18 + 78/18 - (-5)/18
C = -4/18 + 78/18 + 5/18
C = 79/18
D = -3/20 + 6/31 : (-1)/31
D = -3/20 + 6/31 * (-31)
D = -3/20 - 6
D = -3/20 - 120/20
D = -123/20
E = -11/2 - (-11)/4 : (-7)/4
E = -11/2 - (-11)/4 * (-4)/7
E = -11/2 - 11/7
E = -77/14 - 22/14
E = -99/14
F = 15/19 * (13/5 + 10/3)
F = 15/19 * (39/15 + 50/15)
F = 15/19 * 89/15
F = 89/19