Negative Numbers

- Your laptop (go to lessonup.app)
- A pen to write with

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

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

Lesson duration is: 45 min

Items in this lesson

- Your laptop (go to lessonup.app)
- A pen to write with

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
- 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?

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

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
Finished? Do exercise 2 and 5
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7:00

Slide 18 -Slide

Lesson wrap up
What did we learn today?

- We learned how to multiply and divide integers