Réponses

2013-04-21T16:28:58+02:00

7/3 x 3/5 x 5/7 = 1

 

33/54 + 1/18 = 594/972 + 54/972 = 648/972 = 2/3

 

5/12 x 15/5 + 3/4 = 15x3/12x4 = 5x3x3/3x4x4 = 15/16

 

En espérant t'avoir aidé.

2013-04-21T16:31:04+02:00

1  = 7/3 x 3/5 = 21/15 x 5/7 = 105/105 = 105.

2  = 33/54 + 1/18 = 33/76.

3  =5/12 x 15/5 = 75/60 + 3/4 = 78/64.                                 Je pense que sa doit être sa .......!!!!!