Answer
$-\frac{1}{2}$
Work Step by Step
$\frac{1}{3}-\frac{5}{6}=\frac{1\times2}{3\times2}-\frac{5}{6}=\frac{2}{6}-\frac{5}{6}=\frac{2-5}{6}=-\frac{3}{6}=-\frac{1}{2}$
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