1Thv Ch8 Negative Numbers + - X and :

Today
 Practice with what we learned in last lessons
-add and subtract negative numbers

 What are today's learning intentions
- multiply positive and negative numbers
- divide positive and negative numbers

We will also look back at and work on some exercises.

1 / 26
suivant
Slide 1: Diapositive
WiskundeMiddelbare schoolmavo, havo, vwoLeerjaar 1

Cette leçon contient 26 diapositives, avec quiz interactifs et diapositives de texte.

time-iconLa durée de la leçon est: 45 min

Éléments de cette leçon

Today
 Practice with what we learned in last lessons
-add and subtract negative numbers

 What are today's learning intentions
- multiply positive and negative numbers
- divide positive and negative numbers

We will also look back at and work on some exercises.

Slide 1 - Diapositive

First...
- open your Notebook and Textbook
- show your teacher IF you made 48, 50 and 52
- also show your teacher HOW you made them;
   the POINT is that CALCULATIONS are NEEDED!
  WHY? Well, the tasks are pretty complicated,
  so it is important to work them out STEP by STEP!

Slide 2 - Diapositive

1.Copy the 4 tasks and       48  
2. Work them out.
3.Finally write down
   the ANSWER.
timer
5:00

Slide 3 - Diapositive

COMPARE and CORRECT                  48
YOUR               
CALCULATIONS AND    
OUTCOMES !

Slide 4 - Diapositive

1. COPY the tasks and                  50
2. WORK them OUT
timer
4:00

Slide 5 - Diapositive

Compare and correct
your WORK!

Slide 6 - Diapositive

Now 1. Copy and 2.Work out these tasks:
NOTE: First WORK OUT the LEFT side and the RIGHT side. Only then choose for the correct sign!
50.
timer
4:00

Slide 7 - Diapositive

Compare your Calculations with these
and CORRECT your work!

Slide 8 - Diapositive

What did we talk about last lesson?
How to 
- add a negative number 
- subtract a negative number 


Slide 9 - Diapositive

Where do we see negative numbers in our daily lives?

Slide 10 - Carte mentale

Adding a negative number
3+4=
A
-1
B
1
C
-7
D
7

Slide 11 - Quiz

Adding a negative number
34=
A
7
B
1
C
-7
D
-1

Slide 12 - Quiz

Adding a negative number
3+4=
A
-1
B
1
C
-7
D
7

Slide 13 - Quiz

Subtracting a negative number
34=
A
-1
B
1
C
-7
D
7

Slide 14 - Quiz

Explanation multiplying negative numbers

Slide 15 - Carte mentale

Rules for multiplication

  • When multiplying two numbers  with the same signs, the answer is always positive.

  • When multiplying two numbers  with different signs, the answer is always negative.



Slide 16 - Diapositive

Multiplying numbers
-5 x -4 =
A
20
B
-20

Slide 17 - Quiz

Multiplying numbers
7 x -4 =



A
-28
B
28

Slide 18 - Quiz

Multiplying numbers
-5 x 0 =



A
-5
B
0

Slide 19 - Quiz

Explanation dividing negative numbers

Slide 20 - Carte mentale

Rules for division

  • When dividing two numbers with the same sign, the answer is always positive.

  • When dividing two numbers with different signs, the answer is always negative.



Slide 21 - Diapositive

a negative number divided by a positive number equals
A
a positive number
B
a negative number

Slide 22 - Quiz

Dividing numbers
-28 : -4 =
A
-7
B
7

Slide 23 - Quiz

Dividing numbers
-7 : 1 =
A
-7
B
7
C
-1
D
1

Slide 24 - Quiz

Lesson evaluation
Are you now able to multiply and divide negative numbers?
😒🙁😐🙂😃

Slide 25 - Sondage

Let's do some exercises

Slide 26 - Diapositive