Uregenteeeeeee me ajudem vale 1,5 pontos!!!

1)Resolva:

a) (+3) + (-2) + (-5)=

b) (-2) - (+1) - (+5)=

c) (+4) - (-2) - (+3)=

d) (+5) - (-3) - (+3)=

e)(+4) + (-6) - (+7) - (-6) + (+7)=
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