Bonjour
Ranger dans l'ordre croissant les nombres:
1/5 = (1 x 4) / (5 x 4) = 4/20
-7/10 = (- 7 x 2) / (10 x 2) = - 14/20
3/4 = (3 x 5) / (4 x 5) = 15/20
-1/2 = (- 1 x 10) / (2 x 10) = - 10/20
-1/4 = (- 1 x 5) / (4 x 5) = - 5/20
3/5 = (3 x 4) / (5 x 4) = 12/20
13/20
Donc :
- 7/10 < - 1/2 < - 1/4 < 1/5 < 3/5 < 13/20 < 3/4.