Réponse:
coucou
30/60 40/60 15/60 45/60 36/60 50/60
6/60 18/60 25/60
Réponse :
3.
1/2 = 30/60
2/3 = 40/60
1/4 = 15/60
3/4= 45/60
3/5 = 36/60
5/6 = 50/60
1/10 = 6/60
3/10 = 18/60
5/12 = 25/60
7/15 = 28/60
9/20 = 27/60
7/30 = 14/60
4.
a. 12/21 = 4/7 car :
12 : 3 = 4
21 : 3 = 7
b.
24/42 :
12 X 2 = 24
21 X 2 = 42
36/63 :
12 X 3 = 36
21 X 3 = 63
48/84 :
12 X 4 = 48
21 X 4 = 84
Bonne journée et bonne reprise demain !
