Sagot :
Réponse:
Salut
Explications étape par étape:
A = 4/5 - (7/10 - 5/6)
= 4/5 - (42/60-50/60)
= 4/5 + 8/60
= 240/300 + 40/300
= 280/300
= 28/30
A = 14/15
B = 3/18 + 5/11 × 77/15
= 3/18 + 5 × 7/15
= 3/18 + 7/3
B = 5/2
Réponse:
Salut
Explications étape par étape:
A = 4/5 - (7/10 - 5/6)
= 4/5 - (42/60-50/60)
= 4/5 + 8/60
= 240/300 + 40/300
= 280/300
= 28/30
A = 14/15
B = 3/18 + 5/11 × 77/15
= 3/18 + 5 × 7/15
= 3/18 + 7/3
B = 5/2