\documentclass[a4paper,10pt]{classPres}

\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*}
        5 \times ... = 45
    \end{eqnarray*}
\end{frame}

\begin{frame}{Calcul 2}
    \huge
    Calculer avec la formule quand $a = 2$ et $b = 3$
    \[ F = a + b + 2b \]
\end{frame}

\begin{frame}{Calcul 3}
    \huge
    Calculer l'aire de la figure
    \begin{center}
        \begin{tikzpicture}
            \filldraw[very thick, fill=blue!60] (-3,3) -- (-3,0) -- (4,0) -- (4,3) -- cycle;
            \draw[step=1] (-5,-1) grid (5,5);

        \end{tikzpicture}
    \end{center}
    
\end{frame}

\begin{frame}{Calcul 4}
    \huge
    Quelle est la probabilité de tirer un nombre pair?
    \begin{center}
        \begin{tikzpicture}[scale=3]
            \draw (0,0) circle (1);
            \draw (0:-1) -- (0:1);
            \draw (22:0.7) node {$2$};
            \draw (22:-0.7) node {$3$};

            \draw (45:-1) -- (45:1);
            \draw (67:0.7) node {$2$};
            \draw (67:-0.7) node {$1$};

            \draw (90:-1) -- (90:1);
            \draw (112:0.7) node {$3$};
            \draw (112:-0.7) node {$4$};

            \draw (-45:-1) -- (-45:1);
            \draw (-22:0.7) node {$2$};
            \draw (-22:-0.7) node {$6$};
        \end{tikzpicture}
    \end{center}
\end{frame}

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


\end{document}