\begin{figure}[htb]
	\centering

\begin{tikzpicture}
	
	\draw[-latex, thick] (-6,0) -- (6, 0);
	
	\foreach \c in {-5,0,...,5}{
		\draw (\c,-.1) -- (\c,.1) node[below=4pt] {$\scriptstyle\c$};	
	}
	
	\draw[latex-latex](-5,0.5) --(0,0.5) node[above, midway]{$|-5|=5$};
	\draw[latex-latex](0,0.5) --(5,0.5) node[above, midway]{$|5|=5$};
	
\end{tikzpicture}
\caption{Betrag einer reellen Zahl}
\end{figure}