bonjour,
a) 9-4+(6-11)-(-8+3-2)
a = 9 - 4 + 6 - 11 + 8 - 3 + 2
a = 25 - 18 = 7
b) -16-(7-15+4)-(-5+12)
= - 16 - ( - 15 + 11 ) - ( 7 )
= - 16 - ( - 4) - 7
= - 16 + 4 - 7
= - 19
c) 7-5+(2-3)-(-7+5-3)
= 7 - 5 + ( - 1) - ( - 5 )
= 7 - 5 - 1 + 5
= 12 - 6 = 6
d) -10-(5-3+2)-(-13+12)
fais le dernier, rien de compliqué
