6- Resolva as expressões:
a) (-12) + (-5 - 1+6)
b) (-2) × [(-3) + (4)]
c) (-2) × (-14) . (-5)
a) (-12) + (-5 - 1+6)
b) (-2) × [(-3) + (4)]
c) (-2) × (-14) . (-5)
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b(-2) × [(-3) + (4)]= -2
c)(-2) × (-14) . (-5)= -140