Bonjour,

Ex. 1 :

3/4 + 2/6 = 9/12 + 4/12 = 13/12

2/15 + 3/20 = 8/60 + 9/60 = 17/60

5/12 - 9/8 = 10/24 - 27/24 = -17/24

Ex. 2 :

1 - (3/5 + 4/15 + 1/10) = 3030 - (18/30 + 8/30 + 3/30)

                                 = 1/30

Bonjour,

Exercice 1

9/12 + 4/12 = 13/12

8/60 + 9/60 = 17/60

10/24 -  27/24 = -17/24

Exercice 2

3/5 + 4/15 +1/10  =

18/30+ 8/30 + 3/30 = 29/30

30/30 - 29/30 => 1/30 pour les sorties