diff --git a/20210706/rechnen-1.tex b/20210706/rechnen-1.tex
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+\documentclass{article}
+
+\usepackage{enumerate}
+
+\begin{document}
+
+  \begin{tabbing}
+    1) 1384 : 1000 = \textbf{1}\\
+    2) \=(1384 - 1 * 1000 = 384)\\
+    \> 384 : 100 = \textbf{3}\\
+    3) (1384 - 1 * 1000 - 3 * 100 = 84)\\
+    \> 84 : 10       = \textbf{8}\\
+    4) 1384 - 1 * 1000 - 3 * 100 - 8 * 10 = \textbf{4}
+  \end{tabbing}
+
+  \begin{enumerate}
+    \item
+      1384 : 1000 = \textbf{1}
+    \item
+      (1384 - 1 * 1000 = 384)\\
+      384 : 100 = \textbf{3}
+    \item
+      (1384 - 1 * 1000 - 3 * 100 = 84)\\
+      84 : 10  = \textbf{8}
+    \item
+      1384 - 1 * 1000 - 3 * 100 - 8 * 10 = \textbf{4}
+  \end{enumerate}
+
+  \begin{enumerate}[1)]
+    \item
+      1384 : 1000 = \textbf{1}
+    \item
+      (1384 - 1 * 1000 = 384)\\
+      384 : 100 = \textbf{3}
+    \item
+      (1384 - 1 * 1000 - 3 * 100 = 84)\\
+      84 : 10  = \textbf{8}
+    \item
+      1384 - 1 * 1000 - 3 * 100 - 8 * 10 = \textbf{4}
+  \end{enumerate}
+
+  \begin{enumerate}[1)]
+    \item
+      $1384 : 1000 = \textbf{1}$
+    \item
+      $(1384 - 1 \cdot 1000 = 384)$\\
+      $384 : 100 = \textbf{3}$
+    \item
+      $(1384 - 1 \cdot 1000 - 3 \cdot 100 = 84)$\\
+      $84 : 10  = \textbf{8}$
+    \item
+      $1384 - 1 \cdot 1000 - 3 \cdot 100 - 8 \cdot 10 = \textbf{4}$
+  \end{enumerate}
+
+\end{document}