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Nombres décimaux et fractions décimales

S1 E62
·
2018

Decimal fractions and decimal numbers describe new numbers to compensate for the inadequacy of whole numbers, especially for measuring length. The graduated ruler is one of the first encounters students have with decimal numbers. This video is an introduction to decimal fractions and decimal numbers. A decimal fraction is a division of a unit into a number of parts equal to a power of 10 (10, 100, 1000, etc.). A decimal number is a number that can be written as a decimal fraction.

Levels:
Élémentaire 4e année 5e année 6e année Secondaire
Subjects:
Mathématiques Nombres
Skills:
Pensée critique Résolution de problèmes
French level:
A2 : Intermédiaire ou de survie B1 : Seuil
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E63 : Se repérer sur un quadrillage

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Students learn to find their way around a grid by knowing the concepts of column, row and square. They cross the columns and rows to find the box and code it as (A,1). Conversely, they must locate a square based on the location code.
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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 4e année 5e année 6e année Secondaire
    Subjects:
    Mathématiques Nombres
    Skills:
    Pensée critique Résolution de problèmes
    French level:
    A2 : Intermédiaire ou de survie B1 : Seuil