Răspuns:
1.
a)
(-7)+(-9)-(+6)-(-13)-(-21)=
-7-9-6+13+21=+12
b)
(-12)+(+19)-(+23)-(-27)+(-15)=
-12+19-23+27-15=-4
c)
(-5)-[(-43)+(+26)-(-29)+(-18)]-(+17)=
-5-(-43+26+28-18)-17=
-5+7-17=-15
d)
(-14+19)-[-(-43)+(-28)-(-37)+(-25)]=
+5-(+43-28+37-25)=
+5+27=+32
e)
(-15+18)-{(-13)+(+9)-[-(-33)-(+39)+(-24)-(-43)]-(-52+47)}=
+3-[-13+9-(+33-39-24+43)+5]=
+3-(-13+9+13+5)=
+3-14=-11
sper că te-am ajutat
