The document discusses negative numbers and how they relate to temperature scales. It provides examples of number lines that extend to the left of zero to demonstrate negative numbers. It then shows vertical and horizontal temperature scales and asks questions about finding missing numbers and comparing temperatures on the scales. Finally, it asks the reader to order a set of numbers from coldest to warmest based on their position on the temperature scale.

1. Negative Numbers
What do you understand by
this?

2. Understanding Negative Numbers
We think of numbers being on a number
line:
These numbers are all positive numbers,
although we don’t actually put the + sign
in front of each number
∞

3. Understanding Negative
Numbers
The number line can also continue on past 0:
These new numbers are negative numbers.

4. Negative Numbers
The temperature
scale is often seen
vertically.
As the temperature
goes below
freezing we use
negative numbers.
0
1
2
3
4
5
6
- 1
- 2
- 3
- 4
- 5
- 6
Water freezing
Getting warmer
Getting colder

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
-4 -3 -2 -1 0 1-6-7-8-9-10-11 -5
What’s the missing number?

9. Negative Numbers
-21 -20 -19 -18 -17 -16-23-24-25-26-27-28 -22
What’s the missing number?

10. Negative Numbers
-14 -12 -10 -8 -6 -4-18-20-22-24-26-28 -16
What’s the missing number?

11. 0
5
10
15
25
20
30
35
40
-20
-15
-10
-5

12. Negative Numbers
0 5 10 15 20 25 30-5-10-15-20-25-30
Which is colder -5 or -20? Why?

13. Can you order this set of numbers starting with
the coldest?
20
5
- 2
- 15 10
- 20

14. Discuss Temperature
Difference & Change
NNS Thermometer