\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}