\documentclass[12pt,a4paper]{article}

% Packages for formatting
\usepackage[landscape, margin=1cm]{geometry} % Set landscape layout and margins
\usepackage{lipsum} % Generate placeholder text, you can remove this
\usepackage{multicol} % For multiple columns

\usepackage{amsmath,amsfonts,amssymb}
\usepackage{tabularx,tabulary}
\usepackage{array} % Add the array package for 'm' column type
\usepackage{graphicx}
\usepackage{booktabs}
\usepackage{draftwatermark}
\usepackage{fontenc}
\usepackage{setspace}

\setstretch{1.5}
\SetWatermarkText{MOSAID}
\SetWatermarkLightness{0.95}
\SetWatermarkScale{0.4}

\newcommand\ddfrac[2]{\frac{\displaystyle #1}{\displaystyle #2}}


\begin{document}

\thispagestyle{empty}

\setlength{\columnsep}{1cm} % Adjust the column separation here
\setlength{\columnseprule}{1pt}

\newcolumntype{M}[1]{>{\centering\arraybackslash}m{#1}}


\begin{multicols}{2} % Start two-column layout
\noindent
\begin{tabularx}{\linewidth}{|M{0.30\linewidth}|M{0.25\linewidth}|M{0.35\linewidth}|}
    \hline
    Collège Tariq Ben Ziad 2
    &
    Devoir à domicile N 1
    &
    Année Scolaire 2023-2024
    \\ \hline
    Prof : MOSAID
    &
    1APIC-A
    &
    durée : 1h30min
    \\ \hline
\end{tabularx}
\begin{tabularx}{\linewidth}{|p{0.965\linewidth}|}
    Nom et prénom :  \\
    \hline
\end{tabularx} \\
\noindent
\underline{\textbf{Exercice 1:}}\\
1) Calculer les expressions suivantes: \\
$A=(2,5+2)\times(6,5-2)=$\dotfill \\
\hspace*{0.4cm}=\dotfill = \dotfill\\
$B=2,2\times4+27,15:3=$\dotfill \\
\hspace*{0.4cm}=\dotfill = \dotfill\\
$C=15,5:5\times2-3\times1,2+2$=\dotfill \\
\hspace*{0.4cm}=\dotfill = \dotfill\\
2) Factoriser puis Calculer: \\
$A=3,4\times102-3,4\times2$=\dotfill \\
\hspace*{0.4cm}=\dotfill = \dotfill\\
$B=71,15\times0,25+71,15\times0,75$=\dotfill \\
\hspace*{0.4cm}=\dotfill = \dotfill\\
\underline{\textbf{Exercice 2:}}\\
1) Simplifier les fractions suivantes: \\
$x=\frac{45}{30}=$\dotfill \\
.\dotfill\\
$y=\frac{12\times11}{22\times24}=$\dotfill \\
.\dotfill\\
2) Calculer: \\
$A=\frac{3}{2}+\frac{5}{2} =$\dotfill \\
\hspace*{0.4cm}=\dotfill \\
$B=\frac{5}{7}+\frac{3}{2}=$\dotfill \\
\hspace*{0.4cm}=\dotfill \\
\hspace*{0.4cm}=\dotfill \\
$C=\frac{12}{16}\times\frac{8}{7}\times\frac{14}{4}=$\dotfill \\
\hspace*{0.4cm}=\dotfill \\
\hspace*{0.4cm}=\dotfill \\
$D=\left(\frac{1}{4}+\frac{1}{8}\right)\times\left(1-\frac{1}{2}\right)$ = \dotfill\\
\hspace*{0.4cm}=\dotfill \\
\hspace*{0.4cm}=\dotfill \\
\hspace*{0.4cm}=\dotfill \\
$E=\Large{\ddfrac{ \frac{5}{7} }{ \frac{3}{2} } }$ = \dotfill\\
\hspace*{0.4cm}=\dotfill \\
\hspace*{0.4cm}=\dotfill \\
$D=\left(\frac{1}{4}+\frac{1}{8}\right)\div\left(1-\frac{1}{2}\right)$ = \dotfill\\
\hspace*{0.4cm}=\dotfill \\
\hspace*{0.4cm}=\dotfill \\
\hspace*{0.4cm}=\dotfill \\
\hspace*{0.4cm}=\dotfill \\
\underline{\textbf{Exercice 3:}}\\
1) Déterminer $a$ et $b$ tels que \hspace*{0.5cm} $\frac{12}{a}=\frac{24}{4}$ et $\frac{b}{3}=\frac{5}{2}$\\
\hspace*{1.4cm}$a=$\dotfill $b=$\dotfill \\
2) Completer par le nombre qui convient: \hspace*{0.5cm}
$\ddfrac{2}{4}=\ddfrac{...}{36}=\ddfrac{20}{...}$  \\
\textcolor{white}{.}\hfill \textbf{\underline{Bonne Chance}}\\
\end{multicols} % End two-column layout

\end{document}