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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}[fragile]{Calcul 1}
+    % Fraction
+    Quelle fraction représente la partie rouge de la figure?
+    \vfill
+    \begin{center}
+        \begin{tikzpicture}
+            \draw[thick] (0,0) -- (10, 0);
+            \foreach \x in {0, 1, ..., 10} \draw (\x, -0.1)  -- (\x, 0.1);
+            \draw (0, 0) node [below] {0};
+            \draw (5, 0) node [below] {1};
+            \draw (10, 0) node [below] {2};
+            \draw[very thick, color=red] (0, 0) -- (7, 0);
+        \end{tikzpicture}
+    \end{center}
+    \vfill
+\end{frame}
+
+\begin{frame}{Calcul 2}
+    % Calculs relatifs
+    Calculer la quantité suivante
+    \[
+        -4 + (-3) \times 2 = 
+    \]
+\end{frame}
+
+\begin{frame}[fragile]{Calcul 3}
+    % géométrie
+    Calculer l'aire de la figure bleu
+    \begin{center}
+        \begin{tikzpicture}%[rotate=40]
+                \draw[fill=blue] (-2,3) -- 
+                (-2,0)  node [midway] {x} -- 
+                (3,0) -- 
+                cycle;
+            \draw[fill=blue] 
+                (-2,0) -- node[midway, below left]{2cm}  node [midway] {x}
+                (-2,-3) -- node[midway, below right]{4cm}  node [midway] {//}
+                (3,-3) --  node [midway] {x}
+                (3,0)  --   node [midway] {//}
+                cycle;
+        \end{tikzpicture}
+    \end{center}
+\end{frame}
+
+\begin{frame}{Calcul 4}
+    Est-ce un tableau de proportionnalité?
+    \begin{center}
+        \begin{tabular}{|c|c|c|}
+            \hline
+            Longueur & 2 & 10 \\
+            \hline
+            Pourcentage & 20 & 100 \\
+            \hline
+        \end{tabular}
+    \end{center}
+\end{frame}
+
+\begin{frame}{Fin}
+    \begin{center}
+        On retourne son papier.
+    \end{center}
+\end{frame}
+
+
+\end{document}
diff --git a/4e/Questions_flash/P2/QF_S50-2.pdf b/4e/Questions_flash/P2/QF_S50-2.pdf
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diff --git a/4e/Questions_flash/P2/QF_S50-2.tex b/4e/Questions_flash/P2/QF_S50-2.tex
new file mode 100755
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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}[fragile]{Calcul 1}
+    % Fraction
+    Quelle fraction représente la partie rouge de la figure?
+    \vfill
+    \begin{center}
+        \begin{tikzpicture}
+            \draw[thick] (0,0) -- (10, 0);
+            \foreach \x in {0, 1, ..., 10} \draw (\x, -0.1)  -- (\x, 0.1);
+            \draw (0, 0) node [below] {0};
+            \draw (3, 0) node [below] {1};
+            \draw (6, 0) node [below] {2};
+            \draw (9, 0) node [below] {3};
+            \draw[very thick, color=red] (0, 0) -- (7, 0);
+        \end{tikzpicture}
+    \end{center}
+    \vfill
+\end{frame}
+
+\begin{frame}{Calcul 2}
+    % Calculs relatifs
+    Calculer la quantité suivante
+    \[
+        3 - 6 \times 4 = 
+    \]
+\end{frame}
+
+\begin{frame}[fragile]{Calcul 3}
+    % géométrie
+    Calculer l'aire de la figure bleu
+    \begin{center}
+        \begin{tikzpicture}%[rotate=40]
+            \draw[fill=blue] 
+                (0,0) -- 
+                (0,4) -- node[midway, above]{6cm}  
+                (4,4) --  
+                (4,0)  --   
+                cycle;
+            \draw[fill=white] 
+                (0, 0)  --
+                (2,0)  node [midway] {x} -- 
+                (0,2) -- 
+                cycle node [midway] {x} node[midway,left]{3cm} ;
+            \draw (0, 2) -- (0, 4) node [midway] {x};
+            \draw (2, 0) -- (4, 0) node [midway] {x};
+        \end{tikzpicture}
+    \end{center}
+\end{frame}
+
+\begin{frame}{Calcul 4}
+    Est-ce un tableau de proportionnalité?
+    \begin{center}
+        \begin{tabular}{|c|c|c|}
+            \hline
+            Longueur & 11 & 33 \\
+            \hline
+            Pourcentage & 30 & 100 \\
+            \hline
+        \end{tabular}
+    \end{center}
+\end{frame}
+
+\begin{frame}{Fin}
+    \begin{center}
+        On retourne son papier.
+    \end{center}
+\end{frame}
+
+
+\end{document}