Bonjour !
Exercice 50 :
a. -7/6 : 3/4 = -7/6 * 4/3 = (-7*4) / (6 * 3) = -28/18 = -14/9
b. 3/8 : -3/4 = 3/8 * 4/-3 = (3*4) / (8*-3) = 12/-24 = -1/2
c. -5/9 : -8/3 = -5/9 * 3/-8 = (-5*3) / (9*-8) = -15/-72 = 5/24
Exercice 52 :
a. -3 : 6/5 = -3 * 5/6 = (-3*5) / 6 = -15/6 = -5/2
b. -3/6 : 5 = -3/6 * 1/5 = (-3*1) / (6*5) = -3/30 = -1/10
c. -7/5 : (6 + 1/5) = -7/5 * 5/31 = (-7*5) / (5*31) = -35/155 = -7/31
Exercice 53 :
a. 2/9 : -5/3 = 2/9 * 3/-5 = (2*3) / (9*-5) = 6/-45 = 2/-15
b. 3/5 : 1/5 = 3/5 * 5/1 = (3*5) / (5*1) = 15/5 = 3
c. -1/4 : 3 = -1/4 * 1/3 = (-1*1) / (4*3) = -1/12
d. 22/7 : -11 = 22/7 * 1/-11 = (22*1) / (7*-11) = 22/-77 = -2/7
J'espère t'avoir aidé. Bon courage !
