Bonjour,
Ok , c'est bon, tu as pu éditer
1)
40/2 = 20
20/2=10
10/2=5
=> 2*2*2 *5
2)
32/2 = 16
16/2=8
8/2=4
4/2=2
=> 2*2*2*2*2
3)
2*2*2 = 8
1)
420/2 = 210
210/2= 105
105/3 = 35
35/5 = 7
2*2*3 5*7
252 /2 = 126
126/2 =63
63/3=21
21/3 = 7
=> 2*2*3*3*7
en commun:
2*2*3 5*7
2*2*3*3*7
=> 84
420/252
420/84 = 5
252/84 = 3
420/252 = 5/3