Réponse :
Explications étape par étape
Bonjour
Calculer les sommes et les différences suivantes en respectant les étapes
a)-4/5+7/5
= (-4 + 7)/5
= 3/5
b)1/8-9/8
= (1 - 9)/8
= -8/8
= -1
c)5/6+1/3
= 5/6 + (1 x 2)/(2 x 3)
= 5/6 + 2/6
= 7/6
d)45/15-7/3
= (9 x 5)/(3 x 5) - 7/3
= 9/3 - 7/3
= (9 - 7)/3
= 2/3
e)4/11+2
= 4/11 + (2 x 11)/11
= 4/11 + 22/11
= (4 + 22)/11
= 26/11
f)9/7-5
= 9/7 - (5 x 7)/7
= 9/7 - 35/7
= (9 - 35)/7
= -26/7
