diff --git a/module2/exo2/exercice_R_fr.org b/module2/exo2/exercice_R_fr.org
index cd00b965404fadfced1fe856f401ccc501f4d4b9..da1b6ce86751f8d47fd087a41d6083c7d36a8c14 100644
--- a/module2/exo2/exercice_R_fr.org
+++ b/module2/exo2/exercice_R_fr.org
@@ -11,8 +11,10 @@
 #+HTML_HEAD: <script type="text/javascript" src="http://www.pirilampo.org/styles/lib/js/jquery.stickytableheaders.js"></script>
 #+HTML_HEAD: <script type="text/javascript" src="http://www.pirilampo.org/styles/readtheorg/js/readtheorg.js"></script>
 
-* calcul de moyenne, mediane, max et min et ecart type
+## Calcul de moyenne, mediane, max et min et ecart type
 
+
+Entré des données sur R
 #+begin_src R :results output :exports both
 > données =c(14.0, 7.6, 11.2, 12.8, 12.5, 9.9, 14.9, 9.4, 16.9, 10.2, 14.9, 18.1, 7.3, 9.8, 10.9,12.2, 9.9, 2.9, 2.8, 15.4, 15.7, 9.7, 13.1, 13.2, 12.3, 11.7, 16.0, 12.4, 17.9, 12.2, 16.2, 18.7, 8.9, 11.9, 12.1, 14.6, 12.1, 4.7, 3.9, 16.9, 16.8, 11.3, 14.4, 15.7, 14.0, 13.6, 18.0, 13.6, 19.9, 13.7, 17.0, 20.5, 9.9, 12.5, 13.2, 16.1, 13.5, 6.3, 6.4, 17.6, 19.1, 12.8, 15.5, 16.3, 15.2, 14.6, 19.1, 14.4, 21.4, 15.1, 19.6, 21.7, 11.3, 15.0, 14.3, 16.8, 14.0, 6.8, 8.2, 19.9, 20.4, 14.6, 16.4, 18.7, 16.8, 15.8, 20.4, 15.8, 22.4, 16.2, 20.3, 23.4, 12.1, 15.5, 15.4, 18.4, 15.7, 10.2, 8.9, 21.0)
 > données
@@ -25,13 +27,17 @@
 : [64] 16.3 15.2 14.6 19.1 14.4 21.4 15.1 19.6 21.7 11.3 15.0 14.3 16.8 14.0  6.8  8.2 19.9 20.4 14.6 16.4 18.7
 : [85] 16.8 15.8 20.4 15.8 22.4 16.2 20.3 23.4 12.1 15.5 15.4 18.4 15.7 10.2  8.9 21.0
 
+
+Utilisation de outils R pour avoir les min et max, la mediane et la moyenne
 #+begin_src R :results output :session *R* :exports both
 summary(données)
 #+end_src
 
 #+RESULTS:
-   Min. 1st Qu.  Median    Mean 3rd Qu.    Max. 
-   2.80   11.85   14.50   14.11   16.80   23.40 
+:  " Min. 1st Qu.  Median    Mean 3rd Qu.    Max." 
+:   "2.80   11.85   14.50   14.11   16.80   23.40"
+
+Calcul de l'écart type
 #+begin_src R :results output :session *R* :exports both
 sd(données)
 #+end_src