Question

1) Efetue:
a)
$( + 3) + ( - 2) + ( - 5) =$
b)
$( - 2) - ( + 1) - ( + 5) =$
c)
$( + 4) + ( - 2) - ( + 3) =$
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Answer 1

Resposta:

a) -4

b) -8

c) -1