6. Evaluate each of the following:
(a) 13+ [(-2) + 1]
(b) 0+ (-12)
(c) (-37) - [(-30)+(-7)]
(d) [(-21) – 7] = 3
(e) [(-16) + 15)] + [(-2) + 1]
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a) 13+[(-2)+1]
=13+[-2+1]
=13+(-1)
=12 (ans)
b)0+(-12)
=0-12
=-12 (ans)
c)(-37)-[(-30)+(-7)]
=(-37)-(-30-7)
=(-37)-(37)
=-37-37
= -74 (ans)
d)[(-21)-7]=3
=(-21-7)=3
=-28=3
=3-28
=26 (ans)
e)[(-16)+15)]+[(-2)+1]
=[-16+15]+[-2+1]
=[-1]+[-1]
=-1-1
=-2 (ans)
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