Bonsoir,

b. - 16/3 = (- 16 x 4) / (3 x 4) = - 64/12

- 23/4 = (- 23 x 3) / (4 x 3) = - 69/12

Donc : - 16/3 > - 23/4

d. - 7/5 = (- 7 x 2) / (5 x 2) = - 14/10

- 3/2 = (- 3 x 5) / (2 x 5) = - 15/10

Donc : - 7/5 > - 3/2

e. 7/15 = (7 x 4) / 15 x 4) = 28/60

5/12 = (5 x 5) / (12 x 5) = 25/60

Donc : 7/15 > 5/12

f. 7/12 = (4 x 3) / (12 x 3) = 12/36

7/9 = (7 x 4) / (9 x 4) = 28/36.

Donc : 7/12 < 7/9.