1. Hottest Temp: Coldest Temp:
136°F – Libya – 1922
Coldest Temp:
−128°F – Vostok – 1983

2. Freezing Point of Water°C K
Boiling Point of Water
212
100
373
Freezing Point of Water 32
273

3. Example 1 −5 −2 3 C B A −6 −4 −2 2 4 6

4. Opposites
Opposites are two numbers located the same distance from zero on the number line in opposite directions.
The opposite of a number is also called its additive inverse.

5. Absolute Value
The absolute value of a number x is its distance from zero on the number line.
It is indicated by the symbol |x| and is read “the absolute value of x.”

6. Example 2
Find |3| and |−3|.
|3| = 3
|−3| = 3

7. Example 3
Write the absolute value of:
|−9| =
b. |0| =
c. |4| = 9 4

8. <
is less than
>
is greater than

9. −5 7

10. 6 −2

11. −12 −8

12. 6 5

13. Example 4 Compare using < or >. a. −3 and 2 −3 < 2
b. 3 and −2
3 > −2

14. Example 5
Write the integers −1, 3, and −5 from least to greatest using <.
−5 < −1 < 3

15. Exercise
Write the integers in order from least to greatest using <.
−3, 5, 0, −5

16. Exercise
Write the integers in order from least to greatest using <.
2, −2, 0, 4