Réponse :
Bonjour
Explications étape par étape
a) 9/7 = 9*6/(7*6) = 54/42
54/42 < 57/42 donc 9/7 < 57/42
b) 8/5 = 8*6/(5*6) = 48/30
48/30 > 47/30 donc 8/5 > 47/30
c) 3/7 = 3*2/(7*2) = 6/14
6/14 > 5/14 donc 3/7 > 5/14
d) -10/7 = (-10*2)/(7*2) = -20/14
-3/2 = (-3*7)/(2*7) = -21/14
-20/14 > -21/14 donc -10/7 > -3/2
e) -5/6 = (-5*3)/(6*3) = -15/18
-7/9 = (-7*2)/(9*2) = -14/18
-15/18 < -14/18 donc -5/6 < -7/9
f) -4/15 = (-4*5)/(15*5) = -20/75
-6/25 = (-6*3)/(25*3) = -18/75
-20/75 < -18/75 donc -4/15 < -6/25
