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Mesurer des masses

S1 E60
·
2018

After comparing masses with a Roberval balance, children discover in this video how to measure in grams and kilograms. In particular, it is described how to measure using Roberval's balance and weights (making sure the balance is balanced). Several exercises reinforce this concept. I have also included exercises to help children realize what a gram and a kilogram are. This way, they realize that the gram is a unit of measurement that is used for light objects and the kilogram for heavier objects. I quickly touch on the ton without dwelling on it so as not to overload.

Levels:
Élémentaire 3e année 4e année 5e année
Subjects:
Mathématiques Sens de l'espace
Skills:
Apprentissage autonome Pensée critique Résolution de problèmes
French level:
A2 : Intermédiaire ou de survie B1 : Seuil
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E64 : Soustractions posées sans retenues

3 min 48 s
This video aims to teach you how to do subtraction without carryovers. The idea is to understand that subtraction is only to be done in certain situations (1000-980 or 100-18 are not included, for example). The students must then remember to line up the units, tens, etc. After placing the numbers with the largest above, they calculate…
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E65 : Unités de longueur (cm, m, km)

5 min 20 s
After comparing lengths in direct and indirect comparison, this video discusses the units of measurement for length. We see what a centimeter, a meter and a kilometer correspond to. Students learn that it is necessary to adapt the unit of measurement to what is being measured. They also discover the tools that are useful for measuring…
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E66 : Utiliser la règle

2 min 39 s
How to draw a straight line? How to hold your ruler? These are the two questions that this video will answer. It's all about positioning your fingers well on your ruler and sticking to the ruler with your pencil (well sharpened). I also show how to draw vertical lines for right and left handed people. Two cards are included with…
    Levels:
    Élémentaire 3e année 4e année 5e année
    Subjects:
    Mathématiques Sens de l'espace
    Skills:
    Apprentissage autonome Pensée critique Résolution de problèmes
    French level:
    A2 : Intermédiaire ou de survie B1 : Seuil