aider moi pour le 35 SVp

5/4 +7/2 = 5/4+14/4 = 19/4

5/4 + 9/4 = 14/4 = 7/2

5/4 + 11/8 = 10/8 + 11/8 = 21/8

3/8 + 7/2 = 3/8 + 28/8 = 31/8

3/8 + 9/4 = 3/8 + 18/8 = 21/8

3/8 + 11/8 = 14/8 = 7/4