Réponse :
bonjour
17/12 + 3/4 + 9/2
= 17/12 + 9/12 + 54/12
= 80/12
= 20/3
4/5 - 2/15 + 1/3
= 12/15 - 2/15 + 5/15
= 15/15
= 1
5/8 + ( 19/24 - 1/3 )
= 5/8 + ( 19/24 - 8/24 )
= 5/8 + 11/24
= 15/24 + 11 /24
= 26/24
= 13/12
Explications étape par étape :
