This content is not available from your geographic area.
Log in

Les doubles jusqu'à 10

S1 E45
·
2018

The objective of this video is to recognize a situation where there is a double. I chose to use dice to facilitate the visualization of the double and then to recognize them in calculations and finally simply with the words 'the double of...'. The proposed calculations make it possible to start memorizing, but it will not be enough to know them all.

Levels:
Elementary Grade 1 Grade 2 Grade 3
Subjects:
Mathematics Number
Skills:
Self-Directed Learning Problem Solving Critical Thinking
French level:
B1: Threshold Independent User (B1 - B2) A2: Waystage Basic User (A1 - A2)
Subscription
play_circle

E18 : Additionner 3 nombres

5min2s
After having mastered two-number addition, students can discover three-number addition. The first technique proposed is linear addition starting on the left and going to the right. Next, I suggest combining the numbers to form doubles and facilitate the calculation. This procedure requires that the doubles be well mastered so that…
Subscription
play_circle

E19 : L'addition des dizaines entières.

3min59s
This video discusses addition and subtraction of whole tens. When students have studied numbers up to 100, they have also learned some calculation strategies. These strategies can work but are not always effective. So I propose a technique that relies on the tens in order to do the calculations more quickly. It involves adding the…
Subscription
play_circle

E20 : Additionner et soustraire des nombres décimaux

3min18s
After understanding what a decimal number is, students discover how to perform addition and subtraction with decimal numbers. The element to remember is the alignment of the commas and therefore the units, hundreds, tenths, hundredths, etc. When the alignment is well done, the techniques of addition and subtraction remain the same…
Subscription
play_circle

E21 : Les nombres jusqu'à 10

5min3s
This video is about writing numbers from one to ten in letters. The objective is to recognize and write numbers in letters.
Subscription
play_circle

E22 : Additions posées avec retenues

5min58s
This video is about addition with a carry. It is preferable to have a good knowledge of addition without a carry before starting this new concept. I use the representation of tens and units in the form of cubes in order to concretize the addition of a ten. Indeed, holding is often abstract and it is therefore necessary to use concrete…
Subscription
play_circle

E23 : Les aires

5min47s
This video focuses on measuring in square meters. The square meter is the unit of measurement for areas. And the area measures the surface.
Subscription
play_circle

E24 : Calcul de durée

6min48s
In this video, students learn how to calculate a time between two points in time. Using real-life situations, students learn two strategies for calculating time. The first technique is to go through the nearest full hours. In three steps, it is possible to find a duration. From the beginning of an event, go to the next full hour and…
Subscription
play_circle

E25 : Centaines, dizaines, unités

7min11s
Dans cette vidéo, je propose de revenir sur les centaines en s'entraînant à les lire et à les écrire. Tout d'abord, je rappelle ce que sont les unités et les dizaines. Ensuite, je propose d'illustrer une centaine par un bloc rouge de 10 dizaines afin de se rendre compte des quantités et d'éviter les confusions. …
Subscription
play_circle

E26 : Comparer des longueurs

5min35s
The purpose of this video is to introduce students to length comparison (big, small, short, long). The first step is to make a direct comparison by approaching the objects and aligning them on one side. The direct comparison can be done with the naked eye. If the objects are too far apart, it is necessary to use an intermediate object…
Subscription
play_circle

E27 : Comparer des masses

4min53s
This video introduces the concept of mass (to be distinguished from weight) and how to compare them. They discover the Roberval balance and how it works. The exercises proposed allow them to find the heaviest and lightest objects. They also ask to place objects according to the position of the scale.
Subscription
play_circle

E28 : Comparer des nombres entiers

6min43s
Comparing and ordering are important steps in number manipulation. This video aims to teach some techniques for comparing numbers based on the concepts of tens and units. The idea is to start with a comparison of tens and then compare the units if necessary. This video also reminds you how to use the comparison sign and what the…
Subscription
play_circle

E29 : Comparer et ranger les nombres décimaux

5min59s
After making the connection between decimal fractions and decimal numbers, this video gives techniques for comparing and ordering decimal numbers. The first step is to compare the whole numbers and then, in case of equality, to compare the decimal numbers (tenths, hundredths, thousandths, etc.). The technique remains the same for…
Subscription
play_circle

E30 : Comparer et ranger les nombres jusqu'à 10

5min58s
Comparing and ordering are important steps in number manipulation. The purpose of this video is to introduce students to number comparison by first focusing on quantities. This way, students can make direct comparisons between several objects. Gradually, I propose only the numbers. Then, I give a technique for arranging numbers in…
Subscription
play_circle

E31 : Comparer et ranger les nombres jusqu'à 19

5min10s
Comparing and ordering are important steps in number manipulation. This video aims to teach some techniques for comparing numbers based on the concepts of tens and units. This way, students can realize that for numbers greater than 10, it is possible to compare only the units. I first suggest comparisons with the help of the cubes and…
Subscription
play_circle

E32 : Débuter les additions

6min16s
This video is an introduction to addition. The children understand the meaning of addition (add) and the meaning of the + sign. A few exercises help to familiarize them with the calculations. We also discuss techniques that children can use: fingers, cubes (or other objects), memorizing one of the numbers, the numerical frieze.
Subscription
play_circle

E33 : Débuter les soustractions

6min28s
This video is an introduction to subtraction. Children understand the meaning of subtraction (remove or compare) and the meaning of the - sign. A few exercises are used to familiarize themselves with the calculations. Techniques that children can use are also introduced: fingers, cubes (or other objects) and the number line. It is…
Subscription
play_circle

E34 : Distinguer droite et gauche

8min46s
Distinguishing between the right and left hand is a learning process that takes time, practice and cognitive maturation. Generally, children rely on their dominant hand (especially the writing hand) to distinguish the left hand from the right hand. I also suggest in the video to draw colored dots on each hand in order to distinguish…
Subscription
play_circle

E35 : Divisions posées sans reste

5min26s
This video is an introduction to posed division. It is about understanding the concepts of dividend, divisor and quotient. The students learn how to pose division with a one-digit divisor. Euclidean division with remainder will be the subject of another video.
Subscription
play_circle

E36 : Effectuer des additions en appui sur 10

7min27s
The purpose of this video is to do addition up to 20 with the help of the 10. This means that when doing an addition like 8+4, we break down the 4 to make 8+2+2 in order to go after the 10. This technique will be very useful later on when using the other tens.
Subscription
play_circle

E37 : Figures géométriques : Carré, rectangle, triangle, rond

4min49s
In this video, students will learn to recognize geometric shapes (square, rectangle, triangle, round) based on their characteristics (number of sides). They recognize these shapes regardless of size or orientation. Conversely, the characteristics are given and the students must recognize the figure.
Subscription
play_circle

E38 : La division

4min42s
The purpose of this video is not to do actual division, but rather to introduce students to fair sharing. Master Lucas proposes different concrete sharing situations that the students should know and that they can reproduce. He also makes reference to groups that allow for a link with multiplication: with 6 I can make 2 groups of 3…
Subscription
play_circle

E39 : La symétrie axiale

5min49s
With this video students can take their first steps in symmetry. The idea is to understand what axial symmetry is by using folds. To begin, Master Lucas suggests folding a sheet of paper to obtain a line and painting on one side, then folding the paper again to obtain a symmetrical drawing. The fact of folding the sheet makes it…
Subscription
play_circle

E40 : Le périmètre

7min42s
In this video students can discover the concept of perimeter. They learn that the perimeter is the sum of the sides of a geometric figure. To facilitate the calculation of the perimeter of a square and a rectangle, there are two formulas: rectangle - P = (L+l) x 2 (be careful not to forget the parentheses because of the priorities of…
Subscription
play_circle

E41 : Mathématique - Le sens des multiplications

3min12s
This lesson is about multiplication. Master Lucas explains what multiplication is for and how it works.
Subscription
play_circle

E42 : Les additions et soustractions en ligne jusqu'à 20

6min2s
The purpose of this video is to master several techniques for performing calculations to 20. Children understand the meaning of addition (add) and the meaning of subtraction (remove). They also recognize the symbol for addition (+) and subtraction (-). Several techniques are then used: counting on their fingers, moving forward or…
Subscription
play_circle

E43 : Mathématique - Les additions posées sans retenues

5min19s
In this video, students learn how to add numbers in rows and columns with no holds. The technique used is to add the units and then the tens. For the addition, it is specified that it is necessary to put the units under the units and the tens under the tens. Several exercises are proposed at the end to assimilate the concepts.
Subscription
play_circle

E44 : Les contenances L, cL, mL

9min51s
The objective is to know the units of measurement of capacity (hectoliter, decaliter, liter, deciliter, centiliter, milliliter) and to estimate measurements of capacity (e.g., to know that we do not use hL to measure the capacity of a coffee spoon). Next, I suggest using a table to convert measurements. At this point, we are only…
Subscription
play_circle

E45 : Les doubles jusqu'à 10

3min57s
The objective of this video is to recognize a situation where there is a double. I chose to use dice to facilitate the visualization of the double and then to recognize them in calculations and finally simply with the words 'the double of...'. The proposed calculations make it possible to start memorizing, but it will not be…
Subscription
play_circle

E46 : Les fractions

8min4s
This video allows you to discover the notion of simple fraction. It is about discovering fractions from an everyday situation. The students have probably already talked about the notion of half and quarter and they discover how to represent them (numerator and denominator). They learn how to use fractions to divide.
Subscription
play_circle

E47 : Les heures pleines

4min48s
This video provides an opportunity to discuss reading full or battery hours with your children. I indicate that the large hand is used to show the hours and the small one the minutes. I suggest a color code to make it easier. I indicate that the minute hand should stay on 12 in order to make the battery hours. Then, the students just…
Subscription
play_circle

E48 : Les maisons d'additions : mémoriser les calculs

4min16s
After understanding the meaning of addition, children begin to memorize certain calculations. This video is a fun way to review all the additions up to 10. Under the roof of each house, I put circles like in the Singapore method. This way, children realize that a quantity contains several equations and they can be added together to…
Subscription
play_circle

E49 : Les multiplications posées à un chiffre

7min13s
This video corresponds to the following mathematical skill: 'To know and implement an algorithm of calculation posed to carry out a multiplication'. It aims at mastering a technique to find the answer of a multiplication. Through animations, I tried to explain the process so that it can be reproduced.
Subscription
play_circle

E50 : Les nombres de 69 à 99

8min44s
After having well memorized the sequence of numbers up to 69, I propose this video to understand the functioning of the numbers from 69 to 99. It is a question of memorizing the names of the numbers and also to understand why 70 is called seventy and 90, ninety. To do this, I suggest using additions such as 60+14=74 in order to…
Subscription
play_circle

E51 : Les nombres jusqu'à 5

7min44s
This video deals with numbers and quantities up to 5. The objective is to quickly recognize the writing of numbers and their different representations (fingers, dice, tokens). Students start these exercises by counting one by one. With practice, they will be able to recognize quantities directly without going through the counting…
Subscription
play_circle

E52 : Les solides

6min48s
In this episode, Master Lucas presents the solids. He also emphasizes their characteristics: vertices, edges and faces.
Subscription
play_circle

E53 : Les unités et les dizaines

6min52s
All mathematical concepts become simpler when the tens and units are mastered. Comparing numbers, ordering, adding, subtracting, etc., all rely on this knowledge. In this video I have represented the units by blue cubes and the tens by green bars. The children are led to start from the cubes to find the numbers and vice versa.
Subscription
play_circle

E54 : Lire l'heure

26min46s
After posting five videos on telling time, I wanted to put them all together in one video for students who want to review everything. It is important to know that learning to tell time takes place over several years. So I don't recommend starting from scratch and seeing everything at once. It is better to be progressive in…
Subscription
play_circle

E55 : Lire les heures : moins 10, moins le quart

5min51s
We are coming up on the part of reading the time and the least obvious. Thus, it is better to master the other skills before approaching this video. This means reading the minutes before the next hour: minus twenty-five, minus twenty, etc. Managing multiple pieces of information is an obstacle for many students: they have to locate…
Subscription
play_circle

E56 : Lire les heures de l'après midi

6min20s
After learning how to read the full hours, this video discusses the afternoon hours. I explain that the little hour hand makes two turns in a day, so I show a dial with the hours from 13 to 24. Different exercises allow you to gradually associate the morning and afternoon hours.
Subscription
play_circle

E57 : Mathématique - Lire les minutes

5min48s
After learning to read the full hours and afternoon. This video aims to learn how to read the minutes. I explain that an hour is composed of 60 minutes that we indicate by noting the numbers from 5 to 5. The big hand shows the minutes when the small one indicates the hours. To read the time, we start with the hours, then the minutes…
Subscription
play_circle

E58 : Lire les secondes

5min9s
We meet again for a new video on reading the time with the reading of the seconds. After having mastered the reading of full hours and minutes, the students discover the seconds. They learn that one minute contains 60 seconds and that the seconds hand must therefore make a complete turn to make one minute. The lines used to read the…
Subscription
play_circle

E59 : Mesurer avec une règle (cm, mm)

3min27s
This video is about using the ruler to measure lengths. I introduce the concept of centimeters again and the students can discover the concept of millimeters. The aim is to learn how to position the ruler so that the measurement starts at 0. I also show how to draw lines of different lengths.
Subscription
play_circle

E60 : Mesurer des masses

6min7s
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…
Subscription
play_circle

E61 : Multiplier des nombres décimaux

4min52s
Once students have mastered decimal numbers and multiplication, they can begin to multiply decimal numbers. The idea is to learn to position the numbers before starting the calculation. To do this, simply ignore the decimal point at first and simply perform the multiplication. When it is done, you have to count the number of digits…
Subscription
play_circle

E62 : Nombres décimaux et fractions décimales

7min37s
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…
Subscription
play_circle

E63 : Se repérer sur un quadrillage

5min6s
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.
Subscription
play_circle

E64 : Soustractions posées sans retenues

3min48s
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…
Subscription
play_circle

E65 : Unités de longueur (cm, m, km)

5min20s
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…
Subscription
play_circle

E66 : Utiliser la règle

2min39s
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:
Elementary Grade 1 Grade 2 Grade 3
Subjects:
Mathematics Number
Skills:
Self-Directed Learning Problem Solving Critical Thinking
French level:
B1: Threshold Independent User (B1 - B2) A2: Waystage Basic User (A1 - A2)