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b)-1+3=2
c)-1+(-1)=-2
d)1+(-3)=-2
e)1+(-2)=-1
f)3+(-1)=2
g)1+(-2)=-1
h)-3+1=-2
i)-1+(-1)=-2
j)3+(-2)=1
b) (-1)+3= 2
c) (-1)+(-1)=(-2)
d) 1+(-3)=(-2)
e) 1+(-2)= (-1)
f) 3+(-1)=2
g.1+ (-2)= (-1)
h) .(-3)+ 1 = (-2)
i) (-1) + (-1) = (-2)
j) 3 + (-2) = 1