a)(-12)+(-8)-(+7)-(-9)=
b)8-(-9)+(-11)-(+5)=
c)-(-21)+(-2)-(+16)+ (-5)
d)25-(13+16)=
e)32-(-5+10)=
f)14+(-17+4)=
g)-42-(56-60)=
h)-20-(16-12)=
i)-17+(-5+10)=
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a) (-12)+(-8)-(+7)-(-9)=(-20)-7+9=(-27)+9=(-18)
b) 8-(-9)+(-11)-(+5)=8+9-11-5=17-11-5=6-5=1
c) -(-21)+(-2)-(+16)+(-5)=21-2-16-5=19-16-5=3-5=-2
d) 25-(13+16)=25-29=-4
e) 32-(-5+10)=32-5=27
f) 14+(-17+4)=14+(-13)=14-13=1
g) -42-(56-60)=-42-(-4)=-42+4=38
h) -20-(16-12)=-20-4=-24
i) -17+(-5+10)=-17+5=-12