Lesson 1.4 Comparing and Ordering Integers

Essential Question: How do you compare and order integers?

Key Vocabulary

• Integers: all whole numbers and their opposites

• Negative Integers: integers less than zero

• Positive Integers: integers great than zero

• Absolute Value: how far a number is from zero

Example 1: Graphing and Ordering

• Water freezes at 0°C, but some animals can resist freezing by producing a chemical called the supercooling point. Which insect has the lowest supercooling point?

Insect Supercooling point (°C)

Arctic Beetle -54

Gail Beetle -35

Goldenrod gallfly -9

Snow flea -19

Wooly bear caterpillar -70

Example 2: Finding the Absolute Value

• a.5

• b.-7

Example 3: Opposites

• a. 6

• b. -15

Example 4: Evaluating

• Evaluate the expression when y=-5

– a. –y

– b. 17- |y|