Negative Numbers

Grab your stuff 
You have on your table:
- Your laptop (go to lessonup.app)
- Your grid notebook
- A pen to write with
- Your reader

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2:00
Welcome
1 / 20
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Slide 1: Slide
WiskundeMiddelbare schoolmavo, havo, vwoLeerjaar 1

This lesson contains 20 slides, with interactive quizzes and text slides.

time-iconLesson duration is: 45 min

Items in this lesson

Grab your stuff 
You have on your table:
- Your laptop (go to lessonup.app)
- Your grid notebook
- A pen to write with
- Your reader

timer
2:00
Welcome

Slide 1 - Slide

Today
- What did we talk about last lesson?
- Practice with what we learned in last lesson
- What are today's learning intentions?
- multiply positive and negative integers

- divide positive and negative integers
- Let's do some exercises 
-  No homework

Slide 2 - Slide

What did we talk about last lesson?
How to 
- add a negative integer 
- subtract a negative integer 
(without using a number line)

Slide 3 - Slide

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Where do we see negative integers in our daily lives?

Slide 4 - Mind map

Adding a negative integer
3+(4)=
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A
-1
B
1
C
-7
D
7

Slide 5 - Quiz

Subtracting a negative integer
3(4)=
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A
-1
B
1
C
-7
D
7

Slide 6 - Quiz

Adding a negative integer
3+(4)=
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A
-1
B
1
C
-7
D
7

Slide 7 - Quiz

Learning intentions
After this lesson you should be able to:
- multiply positive and negative integers
- divide positive and negative integers

Slide 8 - Slide

Rules for multiplication

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

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



Slide 9 - Slide

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

Slide 10 - Quiz

Multiplying integers
7 x -4 =



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A
-28
B
28

Slide 11 - Quiz

Multiplying integers
-5 x 0 =



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A
-5
B
0

Slide 12 - Quiz

Rules for division

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

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



Slide 13 - Slide

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

Slide 14 - Quiz

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

Slide 15 - Quiz

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

Slide 16 - Quiz

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

Slide 17 - Poll

Let's do some exercises
What? On page 95 do exercises 1 and 4
 How? In pairs (whisper)
Time? 7 minutes
Help? Use your notes or raise your hand.
Finished? Do exercise 2 and 5
timer
7:00

Slide 18 - Slide

Lesson wrap up
What did we learn today?


- We learned how to multiply and divide integers

Slide 19 - Slide

Slide 20 - Slide