comparer les fraction Aidez moi svp c'et pour demain ;)

Exercice 1

a) 9/8
25/4 = 25 x 2 / 4 x 2 = 50/8
9/8 < 25/4

b) 2/5 = 2 x 4 / 5 x 4 = 8/20
2/5 < 9/20

c) 11/4 = 11 x 2 / 4 x 2 = 22/8
22/8 < 23/8

d) 8/7 = 8 x 6 / 7 x 6 = 56/42
49/42 < 8/7

e) 7/4 = 7 x 8 / 4 x 8 = 56/32
55/32 < 7/4

f) 4/3 = 4 x 3 / 3 x 3 = 12/9
4/3 > 11/9

Exercice 2

a) 17/4 = 17 x 3 / 4 x 3 = 51/12
16/3 = 16 x 4 / 3 x 4 = 64/12
17/4 < 16/3

b) 7/4 = 7 x 7 / 4 x 7 = 49/28
4/7 = 4 x 4 / 7 x 4 = 16/28
7/4 > 4/7

c) 26/18 = 26 x 45 / 18 x 45 = 1170/810
62/45 = 62 x 18 / 45 x 18 = 1116/810
26/18 > 62/45

d) 11/6 = 11 x 3 / 6 x 3 = 33/18
14/9 = 14 x 2 / 9 x 2 = 28/18
11/6 > 14/9