Coucou aidez moi svp merci !!!
C les deux dernier

e)
(+7)+(-5)+(-4)+(-1)+(+4)
=(+2)+(-4)+(-1)+(+4)
=(-2)+(-1)+(+4)
=(-3)+(+4)
=+1
f)
(-3,1)+(-4)+(+15,2)+(+13,1)+(+4)+(-5)
=(-7,1)+(+15,2)+(13,1)+(+4)+(-5)
=(+8,1)+(+13,1)+(+4)+(-5)
=(+21,2)+(+4)+(-5)
=(+25,2)+(-5)
=+20,2
Bonsoir
(+7)+(-5)+(-4)+(-1)+(+4)=
(+11)+(-10)=
11-10=
=1
(-3,1)+(-4)+(+15,2)+(+13,1)+(+4)+(-5)=
(+32,3)+(-12,1)=
32,3-12,1=
=20,2