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Understanding Integers and Absolute Values in Math Lessons

Explore the concept of integers, positive and negative numbers, absolute values, and real-life applications through math exercises and expressions. Learn to write, evaluate, and interpret integers in various scenarios.

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Understanding Integers and Absolute Values in Math Lessons

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  1. Transparency 1 Click the mouse button or press the Space Bar to display the answers.

  2. Splash Screen

  3. Example 1-4b Objective Read and write integers and find the absolute value of an integer

  4. Example 1-4b Vocabulary Integer Whole numbers that are positive, negative and zero { . . . -4, -3, -2, -1, 0, 1, 2, 3, 4, . . . }

  5. Example 1-4b Vocabulary Graph A point on a number line

  6. Example 1-4b Vocabulary Positive Integer Whole numbers that are greater than zero { 1, 2, 3, 4, . . . }

  7. Example 1-4b Vocabulary Negative Integer Whole numbers that are less than zero { . . . -4, -3, -2, -1 }

  8. Example 1-4b Vocabulary Absolute Value The distance the number is from zero on a number line | -5 | = 5

  9. Example 1-4b Math Symbols + 3 positive 3 -3 negative 3 | 3 | absolute value of 3

  10. Lesson 1 Contents Example 1Write Integers for Real-Life Situations Example 2Write Integers for Real-Life Situations Example 3Evaluate Expressions Example 4Evaluate Expressions

  11. Example 1-1a Write an integer for the following situation. The seasonal snowfall for Barrow, Alaska was 3 inches above normal. Write the number + 3 3 Determine the sign by looking for a direction word Above refers to positive Answer: + 3 1/4

  12. Example 1-1b Write an integer for the following situation. The average monthly temperature in Cleveland, Ohio for the month of January was 4 degrees below normal. Answer: –4 1/4

  13. Example 1-2a Write an integer for the following situation. The total rainfall this month is 2 inches below normal. Write the number - 2 2 Determine the sign by looking for a direction word Below refers to negative Answer: - 2 2/4

  14. Example 1-2b Write an integer for the following situation. The total snowfall this month was 5 inches above normal. Answer: + 5 2/4

  15. Evaluate the expression Example 1-3a Write the expression Absolute value means how far the number is from zero on the number line -5 is 5 units from zero Answer: 5 3/4

  16. Evaluate the expression Example 1-3b Answer: 9 3/4

  17. Evaluate the expression Example 1-4a Write the expression | -4 | - | -3 | Follow order of operations P E MD AS 4 4 - 3 4 - Absolute value symbols are enclosures Find  -4  1 Bring down - Find  -3  Answer: 1 Subtract 4/4

  18. Evaluate the expression Example 1-4b * Answer: 3 4/4

  19. End of Lesson 1 Assignment

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