Question

Resolva as operações:
$\frac{21}{7} - \frac{14}{7} = \frac{?}{?}$




$\frac{7}{8} + \frac{2}{4} = \frac{?}{?}$
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Answer 1

$\frac{21}{7} - \frac{14}{7} = \frac{7}{1} \\ \\ \frac{7}{8} + \frac{2}{4} = \frac{9}{12}$

Bons estudos!!!