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Questão 07:
Faça as multiplicações:
a) (+ 7) . (+ 8) =
b) (– 6) . (– 4) =
c) (– 7) . (– 8) =
d) (– 5) . (+ 9) =
e) (+ 7) . (– 8) =
f) (+ 4) . (– 8) =
g) (– 7) . (+ 8) =
h)(– 9) . (+ 9) =
i) 5 . (– 1) =
j)) 7 . (– 6) =