Respuesta:
(+5) + (+4) =+9
(-6) + (-2) = -4
..
(+7) + (-1)= -6
(-8) + (+3) =-5
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Respuesta:
(+5) + (+4) =+9
(-6) + (-2) = -4
..
(+7) + (-1)= -6
(-8) + (+3) =-5