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Algebra 1 Notes: Lesson 2-1 Rational Numbers on the Number Line

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Presentation on theme: "Algebra 1 Notes: Lesson 2-1 Rational Numbers on the Number Line"— Presentation transcript:

1 Algebra 1 Notes: Lesson 2-1 Rational Numbers on the Number Line

2 Vocabulary Natural Numbers

3 Vocabulary Natural Numbers {1, 2, 3, …} Whole Numbers

4 Vocabulary Natural Numbers {1, 2, 3, …} Whole Numbers {0, 1, 2, 3, …}
Integers

5 Vocabulary Natural Numbers {1, 2, 3, …} Whole Numbers {0, 1, 2, 3, …}
Integers {…, -2, -1, 0, 1, 2, …}

6 Rational Numbers Anything that CAN be written as a fraction. Integers
Fractions Decimals

7 Example 1 Name the coordinates of the points graphed on the number line. {-7, 1, 6}

8 Example 2 Name the coordinates of the points graphed on the number line. {8, 9, 10, …}

9 Example 3 Graph the following set of numbers on a number line:
{integers less than -6 or greater than or equal to 1}

10 Example 3 Graph the following set of numbers on a number line.
{integers less than -6 or greater than or equal to 1}

11 Example 3 Graph the following set of numbers on a number line.
{integers less than -6 or greater than or equal to 1}

12 Example 3 Graph the following set of numbers on a number line.
{integers less than -6 or greater than or equal to 1}

13 Example 3 Graph the following set of numbers on a number line.
{integers less than -6 or greater than or equal to 1}

14 Vocabulary Absolute Value

15 Vocabulary Absolute Value Distance from 0

16 Example 4 Find each absolute value. |0.25| 0.25 b) |-¾|

17 Example 5 Evaluate: |y – 8| + 5 if y = 12 |12 – 8| + 5

18 Example 5 Evaluate: |y – 8| + 5 if y = 12 |12 – 8| + 5 |4| + 5

19 Example 5 Evaluate: |y – 8| + 5 if y = 12 |12 – 8| + 5 |4| + 5 4 + 5

20 Example 5 Evaluate: |y – 8| + 5 if y = 12 |12 – 8| + 5 |4| + 5 4 + 5 9

21 Example 5 Evaluate: |y – 8| + 5 if y = 12 |12 – 8| + 5 |4| + 5 4 + 5 9

22 Try on your own |2 - x| x = 5

23 Try on your own |2 - x| - 7 x = 5 Can it be negative???

24 Assignment Pg. 71: 18-56 (even) and 57


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