%@Auteur:Véronique Glaçon\par La flèche \psline{->}(0,0.1)(0.5,0.1) \hspace{0.6cm}signifie que l'on ajoute 7. La flèche \psline{->}(0,0.3)(0,0)\hspace{0.1cm} signifie que l'on soustrait 3. \\Complète le diagramme suivant : \begin{center} \Rnode{A}{\psframebox{\white a \black $6$ \white a}} \hspace{0.7cm} \Rnode{B}{\psframebox{\white a \white $6$ \white a}} \hspace{0.7cm} \Rnode{C}{\psframebox{\white a \white $6$ \white a}} \hspace{0.7cm} \Rnode{D}{\psframebox{\white a \white $6$ \white a}} \par \vspace{0.5cm} \Rnode{E}{\psframebox{\white a \white $6$ \white a}} \hspace{0.7cm} \Rnode{F}{\psframebox{\white a \white $6$ \white a}} \hspace{0.7cm} \Rnode{G}{\psframebox{\white a \white $6$ \white a}} \hspace{0.7cm} \Rnode{H}{\psframebox{\white a \white $6$ \white a}} \par \vspace{0.5cm} \Rnode{I}{\psframebox{\white a \white $6$ \white a}} \hspace{0.7cm} \Rnode{J}{\psframebox{\white a \white $6$ \white a}} \hspace{0.7cm} \Rnode{K}{\psframebox{\white a \white $6$ \white a}} \hspace{0.7cm} \Rnode{L}{\psframebox{\white a \white $6$ \white a}} \end{center} \ncline{->}{A}{B} \ncline{->}{B}{C} \ncline{->}{C}{D} \ncline{->}{E}{F} \ncline{->}{F}{G} \ncline{->}{G}{H} \ncline{->}{I}{J} \ncline{->}{J}{K} \ncline{->}{K}{L} \ncline{->}{A}{E} \ncline{->}{E}{I} \ncline{->}{B}{F} \ncline{->}{F}{J} \ncline{->}{C}{G} \ncline{->}{G}{K} \ncline{->}{D}{H} \ncline{->}{H}{L}