%@P:exocorcp %@Dif:3 Recopie et complète les suites de calculs ci-dessous. \par\vspace{5mm}\par \begin{myenumerate} \item\ldots\,\rnode{A}{}\kern2cm\rnode{B}{}\,10\,\rnode{C}{}\kern2cm\rnode{D}{}\,\ldots\,\rnode{E}{}\kern2cm\rnode{F}{}\,\ldots\,\rnode{G}{}\kern2cm\rnode{H}{}\,\ldots \ncarc[offset=3mm,nodesep=1mm,arcangle=30]{->}{A}{B} \ncput*{\psovalbox{\footnotesize$+4$}} \ncarc[offset=3mm,nodesep=1mm,arcangle=30]{->}{C}{D} \ncput*{\psovalbox{\footnotesize$\times3$}} \ncarc[offset=3mm,nodesep=1mm,arcangle=30]{->}{E}{F} \ncput*{\psovalbox{\footnotesize$\div6$}} \ncarc[offset=3mm,nodesep=1mm,arcangle=30]{->}{G}{H} \ncput*{\psovalbox{\footnotesize$-3$}} \par\vspace{5mm}\par \item\ldots\,\rnode{A}{}\kern2cm\rnode{B}{}\,\ldots\,\rnode{C}{}\kern2cm\rnode{D}{}\,8\,\rnode{E}{}\kern2cm\rnode{F}{}\,\ldots\,\rnode{G}{}\kern2cm\rnode{H}{}\,\ldots \ncarc[offset=3mm,nodesep=1mm,arcangle=30]{->}{A}{B} \ncput*{\psovalbox{\footnotesize$\div5$}} \ncarc[offset=3mm,nodesep=1mm,arcangle=30]{->}{C}{D} \ncput*{\psovalbox{\footnotesize$+3$}} \ncarc[offset=3mm,nodesep=1mm,arcangle=30]{->}{E}{F} \ncput*{\psovalbox{\footnotesize$-2$}} \ncarc[offset=3mm,nodesep=1mm,arcangle=30]{->}{G}{H} \ncput*{\psovalbox{\footnotesize$\times4$}} \par\vspace{5mm}\par \item\ldots\,\rnode{A}{}\kern2cm\rnode{B}{}\,\ldots\,\rnode{C}{}\kern2cm\rnode{D}{}\,\ldots\,\rnode{E}{}\kern2cm\rnode{F}{}\,7\,\rnode{G}{}\kern2cm\rnode{H}{}\,\ldots \ncarc[offset=3mm,nodesep=1mm,arcangle=30]{->}{A}{B} \ncput*{\psovalbox{\footnotesize$+15$}} \ncarc[offset=3mm,nodesep=1mm,arcangle=30]{->}{C}{D} \ncput*{\psovalbox{\footnotesize$\div3$}} \ncarc[offset=3mm,nodesep=1mm,arcangle=30]{->}{E}{F} \ncput*{\psovalbox{\footnotesize$-2$}} \ncarc[offset=3mm,nodesep=1mm,arcangle=30]{->}{G}{H} \ncput*{\psovalbox{\footnotesize$\times3$}} \par\vspace{5mm}\par \item\ldots\,\rnode{A}{}\kern2cm\rnode{B}{}\,\ldots\,\rnode{C}{}\kern2cm\rnode{D}{}\,\ldots\,\rnode{E}{}\kern2cm\rnode{F}{}\,\ldots\,\rnode{G}{}\kern2cm\rnode{H}{}\,10 \ncarc[offset=3mm,nodesep=1mm,arcangle=30]{->}{A}{B} \ncput*{\psovalbox{\footnotesize$\times4$}} \ncarc[offset=3mm,nodesep=1mm,arcangle=30]{->}{C}{D} \ncput*{\psovalbox{\footnotesize$+4$}} \ncarc[offset=3mm,nodesep=1mm,arcangle=30]{->}{E}{F} \ncput*{\psovalbox{\footnotesize$\div4$}} \ncarc[offset=3mm,nodesep=1mm,arcangle=30]{->}{G}{H} \ncput*{\psovalbox{\footnotesize$-1$}} \end{myenumerate} %@Correction: \begin{myenumerate} \item\ldots\,\rnode{A}{}\kern2cm\rnode{B}{}\,10\,\rnode{C}{}\kern2cm\rnode{D}{}\,\ldots\,\rnode{E}{}\kern2cm\rnode{F}{}\,\ldots\,\rnode{G}{}\kern2cm\rnode{H}{}\,\ldots \ncarc[offset=3mm,nodesep=1mm,arcangle=30]{->}{A}{B} \ncput*{\psovalbox{\footnotesize$+4$}} \ncarc[offset=3mm,nodesep=1mm,arcangle=30]{->}{C}{D} \ncput*{\psovalbox{\footnotesize$\times3$}} \ncarc[offset=3mm,nodesep=1mm,arcangle=30]{->}{E}{F} \ncput*{\psovalbox{\footnotesize$\div6$}} \ncarc[offset=3mm,nodesep=1mm,arcangle=30]{->}{G}{H} \ncput*{\psovalbox{\footnotesize$-3$}} {\color{green} \ncarc[linecolor=green,offset=1mm,nodesep=1mm,arcangle=30]{->}{B}{A} \ncput*{\psovalbox[linecolor=green]{\footnotesize$-4$}} } \par\vspace{1cm}\par \item\ldots\,\rnode{A}{}\kern2cm\rnode{B}{}\,\ldots\,\rnode{C}{}\kern2cm\rnode{D}{}\,8\,\rnode{E}{}\kern2cm\rnode{F}{}\,\ldots\,\rnode{G}{}\kern2cm\rnode{H}{}\,\ldots \ncarc[offset=3mm,nodesep=1mm,arcangle=30]{->}{A}{B} \ncput*{\psovalbox{\footnotesize$\div5$}} \ncarc[offset=3mm,nodesep=1mm,arcangle=30]{->}{C}{D} \ncput*{\psovalbox{\footnotesize$+3$}} \ncarc[offset=3mm,nodesep=1mm,arcangle=30]{->}{E}{F} \ncput*{\psovalbox{\footnotesize$-2$}} \ncarc[offset=3mm,nodesep=1mm,arcangle=30]{->}{G}{H} \ncput*{\psovalbox{\footnotesize$\times4$}} {\color{green} \ncarc[linecolor=green,offset=1mm,nodesep=1mm,arcangle=30]{->}{B}{A} \ncput*{\psovalbox[linecolor=green]{\footnotesize$\times5$}} \ncarc[linecolor=green,offset=1mm,nodesep=1mm,arcangle=30]{->}{D}{C} \ncput*{\psovalbox[linecolor=green]{\footnotesize$-3$}} } \par\vspace{1cm}\par \item\ldots\,\rnode{A}{}\kern2cm\rnode{B}{}\,\ldots\,\rnode{C}{}\kern2cm\rnode{D}{}\,\ldots\,\rnode{E}{}\kern2cm\rnode{F}{}\,7\,\rnode{G}{}\kern2cm\rnode{H}{}\,\ldots \ncarc[offset=3mm,nodesep=1mm,arcangle=30]{->}{A}{B} \ncput*{\psovalbox{\footnotesize$+15$}} \ncarc[offset=3mm,nodesep=1mm,arcangle=30]{->}{C}{D} \ncput*{\psovalbox{\footnotesize$\div3$}} \ncarc[offset=3mm,nodesep=1mm,arcangle=30]{->}{E}{F} \ncput*{\psovalbox{\footnotesize$-2$}} \ncarc[offset=3mm,nodesep=1mm,arcangle=30]{->}{G}{H} \ncput*{\psovalbox{\footnotesize$\times3$}} {\color{green} \ncarc[linecolor=green,offset=1mm,nodesep=1mm,arcangle=30]{->}{B}{A} \ncput*{\psovalbox[linecolor=green]{\footnotesize$-15$}} \ncarc[linecolor=green,offset=1mm,nodesep=1mm,arcangle=30]{->}{D}{C} \ncput*{\psovalbox[linecolor=green]{\footnotesize$\times3$}} \ncarc[linecolor=green,offset=1mm,nodesep=1mm,arcangle=30]{->}{F}{E} \ncput*{\psovalbox[linecolor=green]{\footnotesize$+2$}} } \par\vspace{1cm}\par \item\ldots\,\rnode{A}{}\kern2cm\rnode{B}{}\,\ldots\,\rnode{C}{}\kern2cm\rnode{D}{}\,\ldots\,\rnode{E}{}\kern2cm\rnode{F}{}\,\ldots\,\rnode{G}{}\kern2cm\rnode{H}{}\,10 \ncarc[offset=3mm,nodesep=1mm,arcangle=30]{->}{A}{B} \ncput*{\psovalbox{\footnotesize$\times4$}} \ncarc[offset=3mm,nodesep=1mm,arcangle=30]{->}{C}{D} \ncput*{\psovalbox{\footnotesize$+4$}} \ncarc[offset=3mm,nodesep=1mm,arcangle=30]{->}{E}{F} \ncput*{\psovalbox{\footnotesize$\div4$}} \ncarc[offset=3mm,nodesep=1mm,arcangle=30]{->}{G}{H} \ncput*{\psovalbox{\footnotesize$-1$}} {\color{green} \ncarc[linecolor=green,offset=1mm,nodesep=1mm,arcangle=30]{->}{B}{A} \ncput*{\psovalbox[linecolor=green]{\footnotesize$\div4$}} \ncarc[linecolor=green,offset=1mm,nodesep=1mm,arcangle=30]{->}{D}{C} \ncput*{\psovalbox[linecolor=green]{\footnotesize$-4$}} \ncarc[linecolor=green,offset=1mm,nodesep=1mm,arcangle=30]{->}{F}{E} \ncput*{\psovalbox[linecolor=green]{\footnotesize$\times4$}} \ncarc[linecolor=green,offset=1mm,nodesep=1mm,arcangle=30]{->}{H}{G} \ncput*{\psovalbox[linecolor=green]{\footnotesize$+1$}} } \par\vspace*{1cm}\par \end{myenumerate} Ensuite, il faut faire attention à ne pas se tromper dans les calculs.