Răspuns :
a) (-3)-(-2)=(-3)+2=-1;
b)(+4)-(+2)=4-2=2;
c)(-6)-(+6)=-6-6=-12;
(-4)-(-6)=-4+6=2
(+6)-(+8)=6-8=-2
(-18)-(+14)=-18-14=-32
(-12)-(-12)=-12+12=0
(+18)-(+18)=18-18=0
(+19)-(-11)=19+11=30
b)(+4)-(+2)=4-2=2;
c)(-6)-(+6)=-6-6=-12;
(-4)-(-6)=-4+6=2
(+6)-(+8)=6-8=-2
(-18)-(+14)=-18-14=-32
(-12)-(-12)=-12+12=0
(+18)-(+18)=18-18=0
(+19)-(-11)=19+11=30