\documentclass[a4paper,10pt]{classPres}
\usepackage{./horloge}

\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
    \[
        3,451 \times 100 = 
    \]
\end{frame}

\begin{frame}{Calcul 2}
    \huge
    \[
        \frac{1}{2} h = \ldots min
    \]
\end{frame}

\begin{frame}{Calcul 3}
    \LARGE
    Quelle est la nature de $ABCD$?

    \begin{center}
        \includegraphics[scale=1]{./fig/ABCDEFGH_main.png}
    \end{center}

\end{frame}

\begin{frame}{Calcul 4}
    \LARGE
    \[
        \frac{1}{10} + 1 = 
    \]
\end{frame}

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


\end{document}