\documentclass[a4paper,10pt]{classPres}

\usetikzlibrary{snakes}

\author{}
\title{}
\date{}

\begin{document}
\begin{frame}{Calcul mental}
    \begin{center}
        \huge 30 secondes par calcul
    \end{center}
\end{frame}

\begin{frame}{Calcul 1}
    \huge
    \[ 
        34 \times 6 =
    \]
\end{frame}

\begin{frame}{Calcul 2}
    \huge
    L'angle est-il obtus, droit ou aigus?
    \begin{center}
        \begin{tikzpicture}
            \draw[very thick]
            (-3, 3) -- (0, 0) -- (5, 0);
        \end{tikzpicture}
    \end{center}
\end{frame}

\begin{frame}{Calcul 3}
    \LARGE
    Compléter la valeur manquante

    \begin{center}
        \begin{tabular}{|c|*{2}{p{2cm}|}}
        \hline
        Nombre de sacs & 1 & 10 \\
        \hline
        Prix & 4 & ... \\
        \hline
    \end{tabular}
    \end{center}
\end{frame}
\end{frame}

\begin{frame}{Calcul 4}
    \huge
    Calculer l'aire 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]{2cm}
                (0,0) -- 
                (0,1) -- node[midway, below]{3cm}
                (3,1) -- node[midway, rotate=-90, above]{3cm}
                (3,3) -- 
                cycle;
            \draw[dotted, very thick] (0,1) -- (0, 3);
        \end{tikzpicture}
    \end{center}
\end{frame}

\begin{frame}{Fin}
    \begin{center}
        \huge On retourne son papier.
    \end{center}
\end{frame}


\end{document}