Feat(4e): Egalité et additions de fractions
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\documentclass[a4paper,12pt]{article}
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\usepackage{myXsim}
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\author{}
|
||||||
|
\date{Novembre 2018}
|
||||||
|
\title{Découpe de gâteau}
|
||||||
|
\tribe{Quatrième}
|
||||||
|
|
||||||
|
\pagestyle{empty}
|
||||||
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|
||||||
|
\begin{document}
|
||||||
|
\begin{exercise}[subtitle={Partage de gâteau}]
|
||||||
|
Samra, Abdou, Jeannine se partagent un gâteau au chocolat poire banane cacao. Samra en mange la moitié, Abdou un quart et Jeannine un huitième. Ils décident de garder le reste pour leur ami Bob.
|
||||||
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|
||||||
|
Que reste-t-il pour Bob?
|
||||||
|
\end{exercise}
|
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|
\vfill
|
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|
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|
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|
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|
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@ -0,0 +1,46 @@
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Opérations sur les fractions avec les 4e de Mouthe 2018
|
||||||
|
########################################################
|
||||||
|
|
||||||
|
:date: 2018-11-08
|
||||||
|
:modified: 2018-11-08
|
||||||
|
:tags: Nombres et opérations, Fraction
|
||||||
|
:category: 4e
|
||||||
|
:authors: Bertrand Benjamin
|
||||||
|
:summary: Retour sur l'égalité entre fractions puis addition et soustraction de fractions avec les 4e de Mouthe en 2018
|
||||||
|
|
||||||
|
|
||||||
|
Étape 1: Égalité entre fractions
|
||||||
|
================================
|
||||||
|
|
||||||
|
À partir de `dessins <./E1_surface_partagee_eleve.pdf>`_, on retrouve les fractions associées. C'est le moment de voir quelques égalités entre les fractions.
|
||||||
|
|
||||||
|
On les laisse toutes les chercher puis on commence à corriger la première (réajustement pour les plus faibles).
|
||||||
|
Défis pour les 4 dernières:
|
||||||
|
|
||||||
|
- Figure 4: Trouver une fraction avec dénominateur 80
|
||||||
|
- Figure 5: Trouver une fraction avec le plus grand dénominateur
|
||||||
|
- Figure 6 et 7: fraction avec le plus petit dénominateur.
|
||||||
|
|
||||||
|
Cahier de bord: On note ce qu'on a trouvé autour de l'égalité entre fractions.
|
||||||
|
|
||||||
|
Sur la durée on cherchera à travailler les fractions avec un axe.
|
||||||
|
|
||||||
|
Étape 2: Fractions à trous
|
||||||
|
==========================
|
||||||
|
|
||||||
|
Égalité entre fraction à trou à compléter
|
||||||
|
|
||||||
|
Étape 3: Addition de fractions
|
||||||
|
==============================
|
||||||
|
|
||||||
|
Additions entre fractions avec l'illustration soit en tablette de chocolat soit avec un axe.
|
||||||
|
|
||||||
|
Cahier de bord: On écrit quelques exemples de calculs bien rédigés.
|
||||||
|
|
||||||
|
Sur la durée, on fera des exercices du même type.
|
||||||
|
|
||||||
|
Étape 4: Problème de partage d'un gâteau
|
||||||
|
========================================
|
||||||
|
|
||||||
|
`Partage de gâteau <./E4_decoupe_gateau.pdf>`_ où il ne reste plus grand chose...!
|
||||||
|
|
||||||
Loading…
Reference in New Issue