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Integers & Absolute Value

Integers & Absolute Value . Chapter 1-4 Prentice Hall Pre-Algebra. 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. Definitions . Integers Whole numbers and their opposites Absolute Value

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Integers & Absolute Value

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  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 • Integers • Whole numbers and their opposites • Absolute Value • The distance from zero to a number on the number line. • Opposite Numbers • Numbers that are the same distance from zero on the number line.

  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 • Write |−10| in words. Then find |−10| • Absolute value of negative 10; 10 • What is the absolute value of negative 3? • 3 • What is the absolute value of 3? • 3 • What is the absolute value of −9 ? • 9 • Simplify |−7| • 7

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

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

  9. Compare using >, <, or = • −8 ? 0 • < • 4 ? −25 • > • |−6| ? |−12| • < • |10| ? |−10| • =

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