Réponses

2014-10-02T22:04:41+02:00
A:5-4×(-3)-2=-5
(5-4)×(-3-2)=-5
= (1)×(-5)=-5

b:5-4×3+2=-15
5-(4)×(3+2)=-15
=5-(4)×(5)= 5-(20)=-15

c:5-4×(-3)-2=19
5-[4×(-3)-2]=19
=5-(-12-2)= 5-(-14)=19