Sagot :
A)
84=4*21=2*2*7*3
72=8*9=2*2*2*3*3
B)
84/72=2*2*7*3/2*2*2*3*3=7/6
C)
12=2*2*3
12/84=2*2*3/2*2*7*3=1/7
12/72=2*2*3/2*2*2*3*3=1/6
84=4*21=2*2*7*3
72=8*9=2*2*2*3*3
B)
84/72=2*2*7*3/2*2*2*3*3=7/6
C)
12=2*2*3
12/84=2*2*3/2*2*7*3=1/7
12/72=2*2*3/2*2*2*3*3=1/6
Bonjour,
Utilise / pour les fractions
84/2 = 42
42/2 = 21
21/3 = 7
=> 2*2*3*7
72/2 = 36
36/2 = 18
18/2 = 9
9/3 =3
=> 2*2*2*3*3
84/ 72
en commun: 2*2*3 = 12
84/12 = 7
72/12 = 6
84/72 = 7/6
12/2 = 6
6/2 = 3
=> 2*2*3
12/84
en commun: 2*2*3 = 12
12/1 = 1
12/84 = 1/7
12/72
en commun: 2*2*3 = 12
12/72 = 1/6