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Lesson 2-1

Lesson 2-1. Integers and Absolute Value. I Can…. Compare and order integers Find the absolute value of an expression. Compare and Order Integers. Integers can be represented as points on a number line.

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Lesson 2-1

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  1. Lesson 2-1 Integers and Absolute Value

  2. I Can… • Compare and order integers • Find the absolute value of an expression

  3. Compare and Order Integers • Integers can be represented as points on a number line. • Negative numbers like -8, positive numbers like +6, and zero are members of the set of integers.

  4. Example 1: Write Integers for Real-World Situations • 32 feet underground • 500 feet below sea level • A temperature increase of 12°F

  5. Ordering Integers • The numbers on a number line increase as you move from left to right. This can help you determine which of two numbers is greater. INCREASING

  6. Ordering Integers OR

  7. Example 2: Compare 2 Integers • Use the integers graphed on the number line below. • Write two inequalities involving -3 and 4. • Replace the ____ with < or > in -5 ___ -1 to make it true.

  8. Example 3: Order Integers • The top ten fourth round scores of the 2003 LPGA Championship tournament were 0, +1, -4, -2, -1, +4, +2, +3, +5, and -3. Order the scores from LEAST to GREATEST. Graph each integer on a number line Write the numbers as they appear from left to right.

  9. Absolute Value

  10. Example 4: Expressions with Absolute Value • Evaluate the expression. I -4 I – I 3 I

  11. Example 5: Algebraic Expression with Absolute Value • Evaluate I x I – 3 if x=-5

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