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+\documentclass[a4paper,10pt]{classPres}
+\usepackage{tkz-fct}
+
+\author{}
+\title{}
+\date{}
+
+\begin{document}
+\begin{frame}{Questions flashs}
+    \begin{center}
+        \huge 30 secondes par calcul
+    \end{center}
+\end{frame}
+
+\begin{frame}{Calcul 1}
+    \huge
+    \begin{eqnarray*}
+        (2 + 3) \times 11 - 5 = 
+    \end{eqnarray*}
+\end{frame}
+
+\begin{frame}{Calcul 2}
+    \huge
+    Combien de temps s'est écoulé entre 10h15 et 13h30?
+\end{frame}
+
+\begin{frame}{Calcul 3}
+    \huge
+    15 pain au chocolats coûtent 20\euro.
+
+    Combien coûtent 10 pain au chocolat?
+
+\end{frame}
+
+\begin{frame}{Calcul 4}
+    \huge
+    Combien font $\dfrac{7}{4}$ de 10m?
+\end{frame}
+
+\begin{frame}{Fin}
+    \begin{center}
+        \huge On retourne son papier.
+    \end{center}
+\end{frame}
+
+
+\end{document}