utilize jogo de sinais, e resolva as expressões numéricas a seguir:
a) 5 - 3 - (-2) . 3
b) -(3) + 64 : (-8)
c) 3 + √9 - 3 . (-3)
a) 5 - 3 - (-2) . 3
b) -(3) + 64 : (-8)
c) 3 + √9 - 3 . (-3)
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