Answer
$\frac{1}{30}$
Work Step by Step
$5^{-1}-6^{-1}=\frac{1}{5}-\frac{1}{6}=\frac{1\times6}{5\times6}-\frac{1\times5}{6\times5}=\frac{6}{30}-\frac{5}{30}=\frac{6-5}{30}=\frac{1}{30}$
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