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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 \times 5 + 3 \times 4 = 
+    \end{eqnarray*}
+\end{frame}
+
+\begin{frame}{Calcul 2}
+    \huge
+    \[
+        10 - 15 = 
+    \]
+\end{frame}
+
+\begin{frame}{Calcul 3}
+    \huge
+    4kg de fromage coûtent 20\euro.
+
+    Combien coûte 10kg?
+\end{frame}
+
+\begin{frame}{Calcul 4}
+    \huge
+    Calculer le périmètre de la figure
+    \begin{center}
+        \begin{tikzpicture}
+            \filldraw[very thick, fill=blue!60] (-2,3) -- node[midway, sloped, below]{4cm}
+                    (-2,0) -- node[midway, below]{8cm}
+                    (3,0) -- (3,3) -- cycle;
+
+        \end{tikzpicture}
+    \end{center}
+\end{frame}
+
+\begin{frame}{Fin}
+    \begin{center}
+        \huge On retourne son papier.
+    \end{center}
+\end{frame}
+
+
+\end{document}