Source
%@P:exocorcp
%@Auteur: François Meria
%@Dif:2
Calculer les expressions suivantes, en écrivant toutes les étapes
intermédiaires et en respectant les règles de priorité :
\begin{multicols}{3}
\begin{description}
\item [$\diamond$] $A = 11+2\times 7$
\item [$\diamond$] $B = 4\times 9 - 5\times 4$
\item [$\diamond$] $C = 39-5\times 5$
\item [$\diamond$] $D = 9-3\div 3$
\item [$\diamond$] $E = 36\div 4-2+6\times 3$
\item [$\diamond$] $F = 10\times 4\div 2-6\times 3$
\end{description}
\end{multicols}
%@Correction:
\begin{multicols}{3}

$\begin{array}{rl} A = & 11+2\times 7\\ = & 11+14\\ = & 25\\ \end{array}$

$\begin{array}{rl} B = & 4\times 9 - 5\times 4\\ = & 36 - 20\\ = & 16\\ \end{array}$

$\begin{array}{rl} C = & 39-5\times 5\\ = & 39-25\\ = & 14\\ \end{array}$

$\begin{array}{rl} D = & 9-3\div 3\\ = & 9-1\\ = & 8\\ \end{array}$

$\begin{array}{rl} E = & 36\div 4-2+6\times 3\\ = & 9-2+18\\ = & 25\\ \end{array}$

$\begin{array}{rl} F = & 10\times 4\div 2-6\times 3 \\ = & 20-18\\ = & 2\\ \end{array}$
\end{multicols}