Bonjour
4)
a.
5/7 = (5 x 12) / (7 x 12) = 60/84
7/12 = (5 x 7) / (12 x 7) = 35/84
9/14 = (9 x 6) / (14 x 6) = 54/84
10/21 = (10 x 4) / (21 x 4) = 40/84
17/28 = (17 x 3) / (28 x 3) = 51/84
23/42 = (23 x 2) / (42 x 2) = 46/84
b. Décroissant = du plus grand au plus petit.
5/7 > 9/14 > 17/28 > 10/21 > 23/42 > 7/12
c. J'imagine que c'est croissant car décroissant déjà fait en b !
7/12 < 23/42 < 10/21 < 17/28 < 9/14 < 5/7
5)
- 2/3 = (- 2 x 16) / (3 x 16) = - 32/48
5/6 = (5 x 8) / (6 x 8) = 40/48
- 7/8 = (- 7 x 6) / (8 x 6) = - 42/48
11/12 = (11 x 4) / (12 x 4) = 44/48
13/16 = (13 x 3) / (16 x 3) = 39/48
- 17/24 = (- 17 x 2) / (24 x 2) = - 34/48
Donc :
- 7/8 < - 17/24 < - 2/3 < 13/16 < 5/6 < 11/12.
