bonsoir,
c. 13/7+(-8/7)*(-5/4)
= 13/7 + 2/7 * 5
= 13/7 + 10/7
= 23/7
d. 7/3 + 3/2 * -10/21
=7/3 - 5/7
=34/21
Voilà bonne soirée : )
