Svp aider moi c pour demain je dois faire l’exercice 36

Réponse :

a/ -5/9 +4/9 = -5+4 / 9 = -1/9

b/ -5/11 -8/11 = -5-8/11 = -13/11

c/ 2/5 - (-7)/5 = 2-(-7)/5 = 2+7/5 = 9/5

d/ - 4/7 - (-5)/7 = -4-(-5)/7 =-4+5/7 = 1/7