Réponse :
Explications étape par étape
Bjr,
-5/4 = -30/24
-11/12 = -22/24
-1,3/2,4 = -13/24
3/12 = 6/24
9/8 = 27/24
7/6 = 28/24
3/4 +5/12 = 9/12 +5/12 = 14/12 = 7/6
1/6 -1/2 = 1/6 -3/6 = -2/6 = -1/3
7/6 -(-1/3) = 7/6 + 1/3 = 7/6 + 2/6 = 9/6 = 3/2
☺
