Negative Numbers

1
Negative Numbers
What do you understand by this?
2
Understanding Negative Numbers
We think of numbers being on a number line
8
0
2
3
4
5
6
7
8
9
10
1
These numbers are all positive numbers, although
we dont actually put the sign in front of each
number

3
Understanding Negative Numbers
The number line can also continue on past 0
-1
-9
-8
-6
-5
-7
-4
-3
-2
These new numbers are negative numbers.
-
4
Negative Numbers
6
5
4
Getting warmer
3
The temperaturescale is often seen vertically.
2
1
Water freezing
0
- 1
- 2
As the temperature goes below freezing we use
negative numbers.
Getting colder
- 3
- 4
- 5
- 6
5
Negative Numbers - This time the scale is
horizontal
0
1
2
3
4
5
6
-1
-2
-3
-4
-5
-6
6
Negative Numbers
0
2
4
6
8
10
12
-2
-4
-6
-8
-10
-12
The scale changed, each division is worth?
7
Negative Numbers
0
5
10
15
20
25
30
-5
-10
-15
-20
-25
-30
The scale changed, each division is worth?
8
Negative Numbers
-5
Whats the missing number?
9
Negative Numbers
-22
Whats the missing number?
10
Negative Numbers
-16
Whats the missing number?
11
(No Transcript)
12
Negative Numbers
Which is colder -5 or -20?
Why?
13
Can you order this set of numbers starting with
the coldest?
14
Discuss Temperature Difference Change
NNS Thermometer