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bielafashion

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Calcule: a. (-2/3) + (+1/4) = b. (-3/5) + (+3/5) = c. (+1/7) - (+1/3) = d. (-4/5) - (-1/8) = e. (+2/3) - (1/3) = f. (-1,76) + (-3,4) = g. (-3) + (+0,46) =
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Quais são as Funções das Aspas ?
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