Bonjour
Ranger dans l'ordre croissant :
1/5 = (1 x 12) / (5 x 12) = 12/60
- 1/4 = (- 1 x 15) / (4 x 15) = - 15/60
- 2/5 = (- 2 x 12) / (5 x 12) = - 24/60
1/3 = (1 x 20) / (3 x 20) = 20/60
- 2/3 = (- 2 x 20) / (3 x 20) = - 40/60
7/4 = (7 x 15) / (4 x 15) = 105/60
Donc :
- 2/3 < - 2/5 < - 1/4 < 1/5 < 1/3 < 7/4.
