diff --git a/3ePasserelles/Nombres_Calculs/Calcul_litteral/fig/pave_droit.pdf b/3ePasserelles/Nombres_Calculs/Calcul_litteral/fig/pave_droit.pdf
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diff --git a/3ePasserelles/Nombres_Calculs/Calcul_litteral/formule_euler.pdf b/3ePasserelles/Nombres_Calculs/Calcul_litteral/formule_euler.pdf
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diff --git a/3ePasserelles/Nombres_Calculs/Calcul_litteral/formule_euler.tex b/3ePasserelles/Nombres_Calculs/Calcul_litteral/formule_euler.tex
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+\documentclass[a4paper,12pt]{article}
+\usepackage{myXsim}
+
+\author{}
+\date{Novembre 2017}
+\title{Formule d'Euler}
+\tribe{Troisième}
+
+\renewcommand{\arraystretch}{1.5}
+
+\begin{document}
+
+\maketitle
+
+Le but de ce problème est d'arriver à prouver un résultat concernant les prismes droits.
+
+\begin{center}
+    \includegraphics[scale=0.7]{./fig/pave_droit}
+\end{center}
+
+\begin{enumerate}
+    \item Complète les 4 premières colonnes du tableau en t'aidant des prismes ci-dessus.
+
+        \hspace{-0.5cm}
+        \begin{tabular}{|*{5}{p{3cm}|}}
+            \hline
+            Nombre de sommets par base  & Nombre de sommets  & Nombre d'arêtes & Nombre de faces & \dotfill \\
+            \hline
+                                        &&&&\\
+            \hline
+                                        &&&&\\
+            \hline
+                                        &&&&\\
+            \hline
+                                        &&&&\\
+            \hline
+                                        &&&&\\
+            \hline
+                                        &&&&\\
+            \hline
+                                        &&&&\\
+            \hline
+                                        &&&&\\
+            \hline
+        \end{tabular}
+
+    \item Explique comment sans avoir à faire un dessin, on pourrait compléter le tableau suivant.
+
+        \hspace{-0.5cm}
+        \begin{tabular}{|*{5}{p{3cm}|}}
+            \hline
+            Nombre de sommets par base  & Nombre de sommets  & Nombre d'arêtes & Nombre de faces & \dotfill \\
+            \hline
+            15 &&&&\\
+            \hline
+            100 &&&&\\
+            \hline
+        \end{tabular}
+    \item Faire une conjecture sur une propriété des prismes droits.
+    \item Démontrer la conjecture.
+
+\end{enumerate}
+
+\end{document}
+
+%%% Local Variables: 
+%%% mode: latex
+%%% TeX-master: "master"
+%%% End:
+
diff --git a/3ePasserelles/Nombres_Calculs/Calcul_litteral/index.rst b/3ePasserelles/Nombres_Calculs/Calcul_litteral/index.rst
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@@ -0,0 +1,23 @@
+Découverte du calcul littéral avec les 3e passerelles pour l'année 2017-2018
+###########################################################################
+
+:date: 2017-11-13
+:modified: 2017-11-13
+:tags: Calcul littéral
+:category: 3e
+:authors: Bertrand Benjamin
+:summary: Redécouverte des fractions et des calculs associés avec les 3ePasserelles pour l'année 2017-2018.
+
+
+
+Étape 1
+=======
+
+Découverte de la `formule d'Euler <./formule_euler.pdf>`_
+
+Étape 2
+=======
+
+Étape 3
+=======
+