Bonsoir
recopier et compléter :
9/5 … 27/15
9/5 = (9 x 3)/(5 x 3) = 27/15
ou
27/15 = (3 x 9)/(3 x 5) = 9/5
9/5 = 27/15
15/35 … 2/7
15/35 = (3 x 5)/(7 x 5) = 3/7
Ou
2/7 = (2 x 5)/(7 x 5) = 10/35
15/35 # 2/7
28/12 … 7/3
28/12 = (7 x 4)/(3 x 4) = 7/3
Ou
7/3 = (7 x 4)/(3 x 4) = 28/12
28/12 = 7/3