b) (–7) ・ (+2) ・ (–1) = c) (+9) ・ (–2) ・ (+5) = d) (–5) ・ (+3) ・ (–2) = e) (–10) ・ (+2) ・ (+3) =
Respostas
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Resposta:
b) (–7).(+2).(–1) = +14
c) (+9).(–2).(+5) = -90
d) (–5).(+3).(–2) = +30
e) (–10).(+2).(+3) = -60
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