bonjour j ai deux calcul a faire merci 1 5/6 - 13/10 - 7/15 (-)=moin 2 7/4-2/1-11/6

1) 5/6 - 13/10 - 7/15
= 25/30 - 39/30 - 14/30
= -14/30 - 14/30
= -28/30
= 14/15


2) 7/4 - 2/1 - 11/6
= 42/24 - 48/24 - 44/24
= -6/24 - 44/24
= -50/24
= -25/12