# 1Thv Ch8 Negative Numbers + - X and :

Today
Practice with what we learned in last lessons

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.

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Slide 1: Slide
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This lesson contains 26 slides, with interactive quizzes and text slides.

Lesson duration is: 45 min

## Items in this lesson

Today
Practice with what we learned in last lessons

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 -Slide

First...
- open your Notebook and Textbook
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 -Slide

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

#### Slide 3 -Slide

COMPARE and CORRECT                  48
YOUR
CALCULATIONS AND
OUTCOMES !

#### Slide 4 -Slide

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

#### Slide 5 -Slide

Compare and correct

#### Slide 6 -Slide

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 8 -Slide

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

#### Slide 9 -Slide

Where do we see negative numbers in our daily lives?

3+4=
A
-1
B
1
C
-7
D
7

34=
A
7
B
1
C
-7
D
-1

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 -Mind map

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 -Slide

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 -Mind map

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 -Slide

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

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

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 -Poll

Let's do some exercises
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