Modifié le 3 Mai 2009 à 21 h 01.
%@Auteur:Véronique Glaçon\par
\renewcommand{\arraystretch}{1.8}
\[\begin{tabular}{|>{\centering}p{1cm}|>{\centering}p{1cm}|>{\centering}p{1cm}|>{\centering}p{1cm}
|>{\centering}p{1cm}|>{\centering}p{1cm}|>{\centering}p{1cm}|>{\centering}p{1cm}|>{\centering}p{1cm}|}
\hline $20$ & $\div$ & & $+$ & $4$ & $=$ & $14$ \tabularnewline
\hline
\LCC%
& \gray & & \gray & & \gray & \\
$-$ & & $\times$ & & & & $-$ \tabularnewline
\ECC
\hline $8$ & $+$ & $9$ & $\div$ & & $=$ & $11$ \tabularnewline
\hline
\LCC%
& \gray & & \gray & & \gray & \\
& & $\div$ & & & & $+$ \tabularnewline
\ECC
\hline $7$ & $+$ & & & $2$ & $=$ & $13$ \tabularnewline
\hline
\LCC%
& \gray & & \gray & & \gray & \\
$=$ & & $=$ & & $=$ & & $=$ \tabularnewline
\ECC
\hline $19$ & $+$ & & $-$ & $9$ & $=$ & \tabularnewline
\hline
\end{tabular}\]
\renewcommand{\arraystretch}{1}