Aide moi svp mathématiques 5E

1) 12/9 qui vaut 4/3
2) 4/8 qui vaut 1/2
3) 3/2
4)16/11
5)1
6)1/2

Exercice 30:

a)
7/9 + 5/9 = (7+5) /9 = 12/9 = 4/3

b)
19/8 - 15/8 = (19-15) /8 = 4/8 = 1/2

c)
5/12 + 13/12 = (5+13) / 12 = 18/12 = 3/2

d)
9/11 + 7/11 = (9+7) /11 = 16/11

e)
7/18 + 11/18 = (7+11) /18 = 18/18 = 1

f)
27/13 - 1/13 = (27-1) /13= 26/13 = 2

Voilà ! J'espère t'avoir aidé(e) ! :)