Réponse:
5)
A) 125/100 = 25x5/20x5 = 25/20
B) 49/210 = 7x7/30x7 = 7/30
C) 76/28 = 19x4/7x4 = 19/7
6)
A) 9/21 = 3x3/3x7 = 3/7
B) 16/20 = 4x4/4x5 = 4/5
C) 85/90 = 17x5/18x5 = 17/18
D) 30/10 = 3x10/1x10 = 3/1
E) 27/72 = 3x9/3x24 = 9/24
