GeoGebra-5.04/C3/Scripting-and-LaTeX-in-GeoGebra/English
Visual Cue | Narration |
Slide Number 1
Title Slide |
Welcome to this Spoken Tutorial on Number Line: Operations.
|
Slide Number 2
Learning Objectives |
In this tutorial, we will learn how to:
|
Slide Number 3
System Requirements |
This tutorial is recorded using,
macOS Catalina version 10.15.7 Google chrome version 101.0.49 |
Slide Number 4
Pre-requisites
|
To follow this tutorial,
Learners should be familiar with topics in basic mathematics.
|
Slide Number 5
Link for PhET simulation
|
Please use the given link to download the PhET simulation. |
Slide Number 6
PhET simulations
|
In this tutorial, we will use the Number Line: Operations PhET simulation. |
Point to the simulation in the Downloads folder
|
I have already downloaded the simulation to my Downloads folder. |
Double click on the number-line-operations_en.html file | To open the simulation, double click on the number-line-operations_en.html file.
|
Point to the simulation interface | This is the interface of the Number Line: Operations simulation. |
Point to each screen | The interface has four screens:
|
Click on Chips screen | Click on the Chips screen. |
Point to the number line | The screen has a number line to represent the total amount of chips or coins. |
Point to the Total box | The total can also be viewed at the top of the screen in the Total box. |
Point to the right panel next to the Positives bag
|
We can put chips in the Positives bag from the panel on the right.
|
Point to the left panel next to the Negatives bag
|
We can put chips in the Negatives bag from the panel on the left.
|
Point to the information checkboxes | On the top left, we have the following checkboxes.
|
Point to the reset button | The reset button takes us back to the starting point of the simulation. |
Point to the right panel next to the Positives bag
|
Let us put the +1 chip in the positives bag.
|
Point to the number line | The description tells us we have added a positive 1 to the total amount.
|
Point to the Total box | The total amount is now 1. |
Point to the left panel next to the Negatives bag
|
Let us now put the -1 chip in the Negatives bag.
|
Point to the number line | The description tells us we have added a negative 1.
|
Point to the Total box.
|
The total amount is now 0 as 1 + (-1) is 0.
|
Point to the number line | However, we know 1 - 1 is also equal to 0.
|
Point to right panel next to the Positives bag
|
Let us put +2 in the Positives bag. |
Point to the number line | The mark on the line moves two places to the right.
|
Point to right panel next to the Positives bag
|
Let us further put +4 in the Positives bag. |
Point to the number line | The mark on the line now moves four places to the right.
|
Point to the Total box | The total is now 0 + 2 + 4 which is 6.
|
Point to the left panel next to the Negatives bag
|
Let us put the -5 chip in the Negatives bag. |
Point to the number line
|
The description tells us we have added a negative 5.
|
Point to the Total box | Hence, the total is 6 + (-5) which is 1.
|
Point to the Negatives bag | Let us now remove the -1 chip from the Negatives bag. |
Point to number line | The description tells us we have removed a negative 1.
|
Point to the Total box | The total amount is now 1 - (-1) which is 2.
|
Click on the Net Worth screen | Click on the Net Worth screen.
|
Point to the right panel next to the Positives bag | In the right panel, we have different assets.
|
Point to the left panel next to the Negatives bag
|
In the left panel, we have debts.
|
Point to the Net Worth box
|
Using the net worth box on the top, we can calculate the net worth.
|
Slide number 7
Assets and Debts table |
See the following table.
|
Point to the number line | After performing these operations, the final net worth of a person is $100. |
Click on the Operations screen | Click on the Operations screen.
|
Point to the number line | The screen has a number line to represent net worth. |
Point to the Initial Net Worth box
|
At the bottom, there is an initial net worth box.
|
Point to the top right box.
|
On the top right, there is an option to perform two transactions.
|
Point to the plus button.
|
We can add an asset or debt using the plus button.
We can remove an asset or debt using the minus button.
|
Point to the Net Worth box
|
The net worth box next to it displays the net worth amount.
|
Point to the information checkboxes | On the top left, we have the following checkboxes.
|
Point to the eraser button | The eraser button takes us back to the initial net worth. |
Click the reset button | Let us reset our screen. |
Point to the Initial Net Worth box | Let us set an initial net worth of $200.
|
Point to the top right box | Now let us add debt of $300 to the net worth of $200.
|
Point to the Net Worth box | The net worth is now 200 + (-300).
|
Click and hold the Simplify button | Click and hold the simplify button.
Adding a negative number has the same effect as subtracting its additive inverse
|
Click and hold the Equals button | Click and hold the equals button.
This means the person is in debt of $100.
|
Point to the top right box | Let us add assets of $500.
|
Point to the Net Worth box | The net worth is now 200 + (-300) +500.
|
Click and hold the Simplify button | Click and hold the simplify button again.
|
Click and hold the Equals button | Click and hold the equals button.
This means the person has assets of $400.
|
Click on Generic screen | Click on the Generic screen.
|
Point to the Scale | From this list, we can select the scale of the number line.
|
Point to the net worth representations | We can choose between representing one or two numerical expressions.
|
Point to the information checkboxes | On the top left, we have the following checkboxes.
|
Point to the number line | You can explore the Generic screen yourself. |
With this, we have come to the end of this tutorial. Let us summarise. | |
Slide number 8
Summary |
In this tutorial, we have learnt how to:* Add integers on the number line
|
Slide Number 9
Assignment
|
As an assignment,
Compare the different operations on integers. (Note: See table 2)
|
Slide number 10
About the Spoken Tutorial project |
The video at the following link summarises the Spoken Tutorial project.
Please download and watch it.
|
Slide number 11
Spoken Tutorial workshops |
The Spoken Tutorial Project team:
conducts workshops using spoken tutorials and gives certificates on passing online tests. For more details, please write to us.
|
Slide number 12
Forum for specific questions
|
Please post your timed queries in this forum. |
Slide number 13
Acknowledgement
|
The Spoken Tutorial project is funded by the Ministry of Education, Government of India.
|
Slide number 14
Thank you |
This is Radhika Yadav, a FOSSEE summer fellow 2022, IIT Bombay signing off.
|