Réponses

2013-04-02T20:52:16+02:00

N°38

 

A = 5/18 - 4/36 = 10/36 - 4/36 = 6/36 = 1/6

B = 17/12 - (11/12 - 4/12) = 17/12 - 7/12 = 10/12 = 5/6

C = 11/6 -2/3 +1/6 = 11/6 - 4/6 +1/6 = 12/6 - 4/6 = 8/6 = 4/3

D = 23/8 -3/4 -1/2 = 23/8 - 6/8 - 4/8 = 13/8

 

N°30

9h45 + 6h27 = 15h 72 ou 16h02 + 1h58 = 17h60 ou 18h

 

le n° 34 n'est pas visible.

2013-04-02T20:57:18+02:00