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+\documentclass[14pt]{classPres}
+\usepackage{tkz-fct}
+\usepackage{fancybox}
+
+\author{}
+\title{}
+\date{}
+
+\begin{document}
+\begin{frame}{Questions flash}
+    \begin{center}
+        \vfill
+        4e
+        \vfill
+        30 secondes par calcul
+        \vfill
+        \tiny \jobname
+    \end{center}
+\end{frame}
+
+\begin{frame}{Calcul 1}
+    % Probabilité
+    Quelle est la probabilité de tirer une boule avec un nombre pair?
+    \begin{center}
+        \ovalbox{
+            \begin{tikzpicture}[scale=1.8]
+                \draw[fill=red] (0,0) circle (0.4) node {$4$}; 
+                \draw[fill=red] (1,0) circle (0.4) node {$2$}; 
+                \draw[fill=red] (2,0) circle (0.4) node {$9$}; 
+                \draw[fill=green] (0,1) circle (0.4) node {$1$}; 
+                %\draw[fill=green] (1,1) circle (0.4) node {$1$}; 
+                \draw[fill=blue] (2,1) circle (0.4) node {$4$}; 
+                \draw[fill=blue] (0,2) circle (0.4) node {$10$}; 
+                \draw[fill=blue] (1,2) circle (0.4) node {$8$}; 
+                \draw[fill=blue] (2,2) circle (0.4) node {$1$}; 
+            \end{tikzpicture}
+        } 
+    \end{center}
+\end{frame}
+
+\begin{frame}{Calcul 2}
+    % Calculs relatifs
+    Calculer la quantité suivante
+    \[
+        -2 \times (-2) - 5 = 
+    \]
+\end{frame}
+
+\begin{frame}[fragile]{Calcul 3}
+    % géométrie
+    Calculer le volume du pavé
+    \begin{center}
+        \begin{tikzpicture}[every edge quotes/.append style={auto, text=blue}]
+            \pgfmathsetmacro{\cubex}{5}
+            \pgfmathsetmacro{\cubey}{1}
+            \pgfmathsetmacro{\cubez}{3}
+            \draw [draw=black, every edge/.append style={draw=black, densely dashed, opacity=.5}, fill=grey!20]
+            (0,0,0) coordinate (o) -- ++(-\cubex,0,0) coordinate (a) -- ++(0,-\cubey,0) coordinate (b) edge coordinate [pos=1] (g) ++(0,0,-\cubez)  -- ++(\cubex,0,0) coordinate (c) -- cycle
+            (o) -- ++(0,0,-\cubez) coordinate (d) -- ++(0,-\cubey,0) coordinate (e) edge (g) -- (c) -- cycle
+            (o) -- (a) -- ++(0,0,-\cubez) coordinate (f) edge (g) -- (d) -- cycle;
+            \path [every edge/.append style={draw=black, |-|}]
+            (b) +(0,-5pt) coordinate (b1) edge ["30cm"'] (b1 -| c)
+            (b) +(-5pt,0) coordinate (b2) edge ["5cm"] (b2 |- a)
+            (c) +(3.5pt,-3.5pt) coordinate (c2) edge ["10cm"'] ([xshift=3.5pt,yshift=-3.5pt]e)
+            ;
+        \end{tikzpicture}
+    \end{center}
+\end{frame}
+
+\begin{frame}{Calcul 4}
+    La tableau est un tableau de proportionnalité, calculer la valeur manquante
+
+    \begin{center}
+        \begin{tabular}{|c|*{2}{c|}}
+            \hline
+            Prix (en \euro)& 4 &  12 \\
+            \hline
+            Poids (en kg)& 16 &  \\
+            \hline
+        \end{tabular}
+    \end{center}
+
+\end{frame}
+
+\begin{frame}{Fin}
+    \begin{center}
+        On retourne son papier.
+    \end{center}
+\end{frame}
+
+
+\end{document}