Réponses

2014-02-04T20:12:08+01:00
1/2 + 7/2 = 1+7/2 = 8/2
3/8 + 13/8 = 3+13/8 = 16/8 
8/2 = 32/8 donc
16/8 + 32/8 = 16+32/8 = 48/8
2014-02-04T20:38:06+01:00
Bonsoir,

1/2 + 3/8 = 4/8 + 3/8 = 4+3/8 = 7/8

7/2 + 13/8 = 28/8 + 13/8 = 28+13/8 = 41/8
voilà j'espère t'avoir aider