\documentclass[8pt,a4paper]{article}
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\author{Barraud Yann}
\title{}

\usepackage[tikz]{bclogo}
%%%%%%%% Les beaux cadres %%%%%
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\begin{bclogo}[barre = none, couleur = red!20, arrondi = 0.1,logo=\hspace{17pt}]{Propri\'et\'e}
#1
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\newcommand{\sys}[2]{
\left\lbrace
\begin{array}{l}
#1\\
#2
\end{array}
\right.
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%%%%%%%%%%%%%numérotation des exercices%%%%%%%%%%%%%%%%%%%%%%%%%%%
\newcounter{numexos}%Création d'un compteur qui s'appelle numexos
\setcounter{numexos}{0}%initialisation du compteur
\newcommand{\exo}[1]{%Création d'une macro ayant un paramètre
\addtocounter{numexos}{1}%chaque fois que cette macro est appelée, elle ajoute 1 au compteur numexos
\ \vspace{.1cm}\\
\textcolor{blue!100}{Exercice\,\thenumexos\,:}\,#1 
%Met en rouge Exercice et la valeur du compteur appelée par \thenumeexos
}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\parindent=0cm  % Supprime le retrait automatique en début de paragraphe
\begin{document}
\pagestyle{empty}
\setlength{\columnseprule}{0.002cm}

% Titre du chapitre
\begin{minipage}{6cm}
\includegraphics[scale=.5]{coffre.png} 
\end{minipage}
\begin{minipage}{13cm}
\vspace*{1cm}
\begin{center}
{\Huge  \textbf{----- Crack the Code ! -----}}\\
\vspace*{.3cm}
\textbf{Calculatrice interdite !}\\
Sixième D
\end{center}
\end{minipage}
\begin{large}

\vspace*{0.5cm}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%  PREMIERE LIGNE %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%


\begin{minipage}{5cm}
\textbf{\begin{large}
\begin{tabular}{ccccc}
 & 2 & 9 & 3 & 7 \\ 
+ & 3 & 6 & 1 & 8 \\ 
\hline 
$A=$ &   &   &   &   \\ 
\end{tabular} 
\end{large}}
\end{minipage}
\begin{minipage}{5cm}
\textbf{\begin{large}
\begin{tabular}{ccccc}
 & 9 & 4 & 4 & 1 \\ 
- & 5 & 0 & 8 & 4 \\ 
\hline 
$B=$ &   &   &   &   \\ 
\end{tabular} 
\end{large}}
\end{minipage}
\begin{minipage}{5cm}
\textbf{\begin{large}
\begin{tabular}{cc}
\begin{tabular}{c}
$A\rightarrow$ \\
$B\rightarrow$ \\
 \\
\end{tabular}
&
\begin{tabular}{ccccccc}
 & ... & ... & ... & ... \\ 
- & ... & ... & ... & ... \\ 
\hline 
$C=$ &   &   &   &   \\ 
\end{tabular} 
\end{tabular}
\end{large}}
\end{minipage}

\vspace*{.4cm}
\rule{\linewidth}{1pt}
\vspace*{.4cm}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%  DEUXIEME LIGNE %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%


\begin{minipage}{5cm}
\textbf{\begin{large}
\begin{tabular}{ccccc}
 & 3 & 7 & 2 & 8 \\ 
- & 1 & 9 & 4 & 2 \\ 
\hline 
$D=$ &   &   &   &   \\ 
\end{tabular} 
\end{large}}
\end{minipage}
\begin{minipage}{5cm}
\textbf{\begin{large}
\begin{tabular}{ccccc}
 & 7 & 1 & 4 & 3 \\ 
- & 5 & 9 & 2 & 8 \\ 
\hline 
$E=$ &   &   &   &   \\ 
\end{tabular} 
\end{large}}
\end{minipage}
\begin{minipage}{5cm}
\textbf{\begin{large}
\begin{tabular}{cc}
\begin{tabular}{c}
$D\rightarrow$ \\
$E\rightarrow$ \\
 \\
\end{tabular}
&
\begin{tabular}{ccccccc}
 & ... & ... & ... & ... \\ 
+ & ... & ... & ... & ... \\ 
\hline 
$F=$ &   &   &   &   \\ 
\end{tabular} 
\end{tabular}
\end{large}}
\end{minipage}

\vspace*{.4cm}
\rule{\linewidth}{1pt}
\vspace*{.4cm}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%  TROISIEME LIGNE %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%


\begin{minipage}{6.3cm}
\textbf{\begin{large}
\begin{tabular}{cccccc}
&\hspace{.5cm}& &  2 & 7 & 5 \\ 
$\times$& & &  & 2 & 6 \\ 
 \hline 
 &...&...&...&...&... \\
+ &...&...&...&...&... \\
\hline
$G=$& &  &   &   &   \\ 
\end{tabular} 
\end{large}}
\end{minipage}
\begin{minipage}{6.3cm}
\textbf{\begin{large}
\begin{tabular}{cccccc}
&\hspace{.5cm} & & 7 & 5 & 8 \\ 
$\times$& & &  & 3 & 9 \\ 
 \hline 
 &...&...&...&...&... \\
+ &...&...&...&...&... \\
\hline
$H=$& &  &   &   &   \\ 
\end{tabular} 
\end{large}}
\end{minipage}
\begin{minipage}{6.3cm}
\textbf{\begin{large}
\begin{tabular}{cccccc}
&\hspace{.5cm} & & 3 & 0 & 7 \\ 
$\times$& & &  & 5 & 3 \\ 
 \hline 
 &...&...&...&...&... \\
+ &...&...&...&...&... \\
\hline
$J=$& &  &   &   &   \\ 
\end{tabular} 
\end{large}}
\end{minipage}

\vspace*{.4cm}
\rule{\linewidth}{1pt}
\vspace*{.4cm}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%  TROISIEME LIGNE %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
Pose les opérations au brouillon et note tes résultats ici :\\
$K=G+J$ donne $K=$ \begin{tabular}{|c|}
\hline
\hspace{3cm} \\
\hline
\end{tabular}
\hspace{2cm}
$L=H-K$ donne $L=$ \begin{tabular}{|c|}
\hline
\hspace{3cm} \\
\hline
\end{tabular}\\

$M=F-C$ donne $M=$ \begin{tabular}{|c|}
\hline
\hspace{3cm} \\
\hline
\end{tabular}
\hspace{1.8cm}
$N=L-M$ donne $N=$ \begin{tabular}{|c|}
\hline
\hspace{3cm} \\
\hline
\end{tabular}\\


\rule{\linewidth}{1pt}
\vspace*{.4cm}

\begin{tabular}{|c|}
\hline
3,7 \\
\hline
\end{tabular}
$ _{------>}^{\hspace*{.3cm} +2,9}$  \begin{tabular}{|c|}
\hline
\hspace{1cm} \\
\hline
\end{tabular}
$ _{------>}^{\hspace*{.3cm} \times 5}$  \begin{tabular}{|c|}
\hline
\hspace{1cm} \\
\hline
\end{tabular}
$ _{------>}^{\hspace*{.3cm} -13,8}$  \begin{tabular}{|c|}
\hline
\hspace{1cm} \\
\hline
\end{tabular}
$ _{------>}^{\hspace*{.3cm} +7,4}$  \begin{tabular}{|c|}
\hline
\hspace{1cm} \\
\hline
\end{tabular}
$ _{------>}^{\hspace*{.3cm} \times 10}$  \begin{tabular}{|c|}
\hline
\hspace{1cm} \\
\hline
\end{tabular}$\ =P$\\

\vspace*{0.6cm} 

\begin{tabular}{|c|}
\hline
15,6 \\
\hline
\end{tabular}
$ _{------>}^{\hspace*{.3cm} -3,7}$  \begin{tabular}{|c|}
\hline
\hspace{1cm} \\
\hline
\end{tabular}
$ _{------>}^{\hspace*{.3cm} +12,9}$  \begin{tabular}{|c|}
\hline
\hspace{1cm} \\
\hline
\end{tabular}
$ _{------>}^{\hspace*{.3cm} \times 3}$  \begin{tabular}{|c|}
\hline
\hspace{1cm} \\
\hline
\end{tabular}
$ _{------>}^{\hspace*{.3cm} -17,5}$  \begin{tabular}{|c|}
\hline
\hspace{1cm} \\
\hline
\end{tabular}
$ _{------>}^{\hspace*{.3cm} \times 10}$  \begin{tabular}{|c|}
\hline
\hspace{1cm} \\
\hline
\end{tabular}$\ =R$

\vspace*{.4cm}
\rule{\linewidth}{1pt}
\vspace*{.4cm}

\begin{center}
Le code secret est égal à $N+P+R$.
\vspace*{0.8cm}\\
\fbox{\begin{minipage}{5cm}
\hspace*{5cm}
\vspace*{1cm}
\end{minipage}}
\end{center}
\end{large}
\end{document}