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import work from year 2016-2017

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Benjamin Bertrand
2017-06-16 09:49:23 +03:00
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\documentclass[a4paper,10pt]{/media/documents/Cours/Prof/Enseignements/2016-2017/tools/style/classCours}
\usepackage{/media/documents/Cours/Prof/Enseignements/2016-2017/theme}
% Title Page
\titre{Cours nombres relatifs}
% \seconde \premiereS \PSTMG \TSTMG
\classe{Cinquième}
\date{Octobre 2016}
\pagestyle{empty}
\newcommand{\bilan}{%
Les mathématiciens ont inventé les nombres négatifs pour que la soustraction soit toujours possible.
-15 est le résultat de la soustraction 0 - 15
\begin{itemize}
\item -15 et -6,3 sont des nombres \textbf{négatifs}.
\item 85 et 3,7 sont des nombres \textbf{positifs}.
\end{itemize}
\begin{center}
\Ovalbox{
\makebox{Un nombre relatif est un nombre négatif ou positif}
}
\end{center}
Attention, le "-" de "-15" n'est pas une soustraction: c'est la marque qui permet de dire que le nombre est négatif.
Dans la vie courante on peut dire:
\begin{multicols}{2}
\icon[scale=0.3]{thermometer_snow} La température est de $-7^{o}$C.
\icon[scale=0.3]{diving} Le plongeur est descendu à -50m.
\icon[scale=0.3]{coins} Le solde de votre compte est de -400\euro.
\icon[scale=0.3]{elevator} L'ascenseur s'est arrêté à l'étage -2.
\icon[scale=0.3]{papers} L'écriture à été inventé en -3000.
\end{multicols}
}
\begin{document}
\bilan
\vfill
\bilan
\vfill
\bilan
\vfill
\end{document}
%%% Local Variables:
%%% mode: latex
%%% TeX-master: "master"
%%% End:

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Notes sur le chapitre d'introduction des nombres relatifs pour les 5e
#####################################################################
:date: 2016-10-24
:modified: 2017-01-08
:tags: Nombres et calculs
:category: 5e
:authors: Bertrand Benjamin
:summary: Chapitre d'introduction des nombres relatifs pour les 5e de l'année 2016-2017
Étape 1
-------
Des soustractions (avec à la fin des soustractions dites impossibles) sont écrites au tableau.
Les élèves travaillent individuellement pour donner des réponses. Puis plénière de mise en commun.
On écrit des problèmes où l'on aurait besoin de faire les calculs pour discuter des résultats.
Un `bilan sur les nombres relatifs <./bilan_nbr_relatifs.pdf>`_ est donné.
Étape 2
-------
Comparaison des nombres relatifs et placement sur un axe (insister sur le fait que pour comparer des nombres, on peut les placer sur un axe).
Entrainement sur la durée pour faire ces soustractions et comparer les nombres relatifs.