1. Integers & Absolute Value Chapter 1-4 Prentice Hall Pre-Algebra

2. Check Skills You’ll Need Write an integer for each situation. Loose $7 ◦ -7 Find $9 ◦ +9 8 steps forward ◦ +8 3 yards gained ◦ +3 5 floors down ◦ -5

3. Definitions

4. Graphing on a Number Line Graph -1, 4, and -5 on a number line. Compare the numbers and order them from least to greatest. From least to greatest, the numbers are -5, -1, 4

5. Finding Absolute Value Use the number line to find | − 3| and |3|

6. Quick Check 1. Write | − 10| in words. Then find | − 10| ◦ Absolute value of negative 10; 10 2. What is the absolute value of negative 3? ◦3◦3 3. What is the absolute value of 3? ◦3◦3 4. What is the absolute value of − 9 ? ◦9◦9 5. Simplify | − 7| ◦7◦7

7. More Exercises Page 20 1. A profit of $250 ◦ 250 2. 18 degrees below zero ◦ − 18 3. 45 seconds before launch ◦ − 45 4. An elevation of 3,400 ft. ◦ 3400 5. A debt of $50 ◦ − 50 6. 300 ft below sea ◦ − 300 Write an integer to represent the quantity:

8. Write an expression 1. A loss of 1/3 of an investment of d dollars ◦ − 1/3 d 2. n degrees Fahrenheit above r degrees Fahrenheit. ◦ r + n 3. What expression would you use to represent 10 times your height h in inches? ◦ 10h

9. Compare using >,, <, or = 1. − 8 ? 0 ◦<◦< 2. 4 ? − 25 ◦>◦> 3. | − 6| ? | − 12| ◦<◦< 4. |10| ? | − 10| ◦=◦=