%!TEX pdflatex

\documentclass[tikz,margin=1mm]{standalone}
\usetikzlibrary{shapes}

\begin{document}

\begin{tikzpicture}
	\tikzset{CMflecheH/.style={->,>=latex,purple,semithick}}
	\tikzset{CMflecheB/.style={->,>=latex,teal,semithick}}
	\tikzset{CMtexteH/.style={rectangle,draw=purple,fill=purple!50,midway,inner sep=1pt,text=black,font=\tiny}}
	\tikzset{CMtexteB/.style={rectangle,draw=teal,fill=teal!50,midway,inner sep=1pt,text=black,font=\tiny}}
	%noeuds
	\node[inner sep=2pt] (V0) at (0,0) {$V_{0}$} ;
	\node[inner sep=2pt] (V1) at (2,0) {$V_{1}$} ;
	\node[inner sep=2pt] (V2) at (4,0) {$V_{2}$} ;
	%flèches H
	\draw[CMflecheH] (V0.north) to[bend left=45] node[CMtexteH] {$\times 0{,}8$} (V1.north)  ;
	\draw[CMflecheH] (V1.north) to[bend left=45] node[CMtexteH] {$\times 1{,}15$} (V2.north)  ;
	\draw[CMflecheH] (V0.north) to[bend left=75] node[CMtexteH] {$\times (0{,}8\times1{,}15)$} (V2.north)  ;
	%flèches B
	\draw[CMflecheB] (V1.south) to[bend left=45] node[CMtexteB] {$\div 0{,}8$} (V0.south)  ;
	\draw[CMflecheB] (V2.south) to[bend left=45] node[CMtexteB] {$\div 1{,}15$} (V1.south)  ;
	\draw[CMflecheB] (V2.south) to[bend left=75] node[CMtexteB] {$\div (0{,}8\times1{,}15)$} (V0.south)  ;
\end{tikzpicture}

\end{document}