\(\begin{gathered}
a)\,\left| {\frac{{ - 1}}{7}} \right|\, = \frac{1}{7}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,b)\,\,\left| {\frac{1}{7}} \right| = \frac{1}{7} \hfill \\
c)\,\,\left| { - 3\frac{1}{5}} \right|\,\, = \,3\frac{1}{5}\,\,\,\,\,\,\,\,\,\,d)\,\,|0| = 0 \hfill \\
\end{gathered} \)
