Réponse:
Bonjour voici les réponses :
M=7/8 - 1/12
=7×3/8×3 - 1×2/12×2
=21/24 - 2/24
=19/24
N= -4/9 + 5/12
= -4×4/9×4 + 5×3/12×3
= -16/36 + 15/36
-1/36
P= -7/6 - 5/3 + 2/9
= -7×3/6×3 - 5×6/3×6 + 2×2/9×2
=21/18 - 30/18 + 4/18
= -9/18 + 4/18
=-5/18
Q= (4/3 + 2/15) - (3/4 - 1/8)
= (4×5/3×5 + 2×1/15×1) - (3×2/4×2 - 1×1/8×1)
=(20/15 + 2/15) - (6/8 - 1/8)
=22/15 - 5/8
= 17/15
J'espère t'avoir aider
Bonne journée
