\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
    \begin{eqnarray*}
        87,5 + 3,7 - 3 = 
    \end{eqnarray*}
\end{frame}

\begin{frame}{Calcul 2}
    \huge
    \begin{eqnarray*}
        \frac{4}{10} + 8u + \frac{2}{10}u = 
    \end{eqnarray*}
\end{frame}

\begin{frame}{Calcul 3}
    \LARGE Écrire un nombre avec 
    \begin{itemize}
        \item 8 centaines
        \item 2 unités
        \item 6 dixièmes
    \end{itemize}
    
\end{frame}

\begin{frame}{Calcul 4}
    \LARGE
    Quel est l'abscisse du point $A$?

        \begin{tikzpicture}[scale=4]
           \draw[->, ultra thick] (0,0) -- (2.6,0);
            \draw (0,0) node[above] {0};
            \draw (1,0) node[above] {1};
            \draw (2,0) node[above] {2};
            \draw (3,0) node[above] {3};
            \draw[snake=ticks,ultra thick, segment length=0.6666cm] (0,0) -- (2.5,0);
            \draw[snake=ticks,ultra thick, segment amplitude=0.2cm, segment length=4cm] (0,0) -- (2.5,0);

            \draw (1.83333,0) node[below] {A};
        \end{tikzpicture}
    
\end{frame}

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


\end{document}