a]
[tex](-6)-(-8)=(-6)+8=8-6=2\\\\7-(-3)=7+3=10\\\\(-14)-6=-(14+6)=-20\\\\9-12=-(12-9)=-3[/tex]
b]
[tex](-3)-10=-(3+10)=-13\\\\(-11)-(-9)=(-11)+9=-(11-9)=-2\\\\(-8)-(-7)=(-8)+7=-(8-7)=-1\\\\(-9)-2=-(9+2)=-11[/tex]
c]
[tex]13-(-13)=13+13=26\\\\(-40)-(-40)=(-40)+40=0\\\\(-22)-40=-(22-40)=-62\\\\(-53)-30=-(53+30)=-83[/tex]
d]
[tex](-60)-(-30)=(-60)+30=-(60-30)=-30\\\\(-180)-20=-(180+20)=-200\\\\710-(-10)=710+10=720\\\\(-150)-(-200)=(-150)+200=200-150=50[/tex]
