Réponse:
Bonsoir.
Tu étais bien parti pourtant.
Exercice 1.
28/42 = 2/3
25/20 = 5/4
20/24 = 5/6
12/27 = 4/9
3/21 = 1/7
20/36 = 5/9
30/95 = 6/19
Exercice 2.
24/16 = (divise par 8) = 3/2
30/130 = (divise par 10) = 3/13
15/25 = (divise par 5) = 3/5
27/72 = (divise par 9) = 3/8
96/30 = (divise par 6) = 16/5
Exercice 3.
22/33 = (11x2)/(11x3) = 2/3
8/56 = (8x1)/(8x7) = 1/7
20/24 = (4x5)/(4x6) = 5/6
210/120 = (30x7)/(30x4) = 7/4
63/72 = (9x7)/(9x8) = 7/8
36/20 = (4x9)/(4x5) = 9/5
81/36 = (9x9)/(9x4) = 9/4
Exercice 4.
-8/20 = (divise par 4) = -2/5
-7/56 = (divise par 7) = -1/8
-28/-36 = (divise par 4) = 7/9
-65/26 = (divise par 13) = -5/2
