Exo 1302
A)-5+(-2+5)
=-5+3
= -2
B)(-2-4)-(5-7)
=-6-(-2)
=-6+2
=-4
C)[-5-(4-3)]-4
=[-5-(+1)]-4
=[-5-1]-4
=-6-4
=-10
D)+5-3-(-4-7)
=+5-3-(-11)
=+5-3+11
=+2+11
=+13
Exo 1308
A)(-5+4)+3
=-1+3
=2
B)-3+5+(4-2-5)
=-3+5+(2-5)
=-3+5+(-3)
=2-3
=-1
