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

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

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

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.

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.”

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

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

< is less than > is greater than

−5 7

6 −2

−12 −8

6 5

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

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

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

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