Réponse :
Explications étape par étape
Bjr,
A = 27/2 -10 = 135/10 - 100/10 = 35/10 = 7/2
B= 3/5 - 2/20 = 12/20 -2/20 = 10/20 = 1/2
C: 34/5/(4/5 -3/8) = 34/5 / (32/40 - 15/40)
= 34/5 /(17 /40 )= 34/5 * 40/17 = 1360/85 =272/17
D: 9/4 + 5/6 = 54/24 + 20/24 = 74/24 = 37/12
E: (-175/45 )/ 12/30 - 5/30 = (-35/9)/ (7/30) = -35/9 * 30/7 =
-1050/63= - 350/21= - 50/3
F:
numérateur: 6/6 -3/6 +2/6 = 5/6
dénominateur: 6/6 +3/6 -2/6 = 7/6
(5/6)/(7/6) = 5/6 * 6/7 = 30/42 = 15/21 = 5/7
☺
