Question
Add or subtract. Simplify. \begin{array}{r} \frac{2}{3} \\ +\frac{1}{3} \end{array} \begin{array}{r} \frac{4}{5} \\ +\frac{3}{5} \\ \hline \end{array} \begin{array}{r} \frac{5}{6} \\ +\frac{5}{6} \\ \hline \end{array}
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