10.5 Addition and Subtraction with unlike denominators

1. 10.5 Addition and Subtraction with unlike denominators Steps: • Find a least common denominator (LCD) • Rename fractions • Add or subtract numerators

2. REVIEW:

3. How to get a LCD with RE • Factor the denominators • Take one of each factor • If there are duplicates take the one with the highest exponent

4. Rename Fractions with LCD • Compare the LCD to the denominator of each fraction • Multiply the numerator and denominator of the fraction by a number or polynomial to make your denominator match your LCD

5. Example 1

6. Example 2:

7. Example 3:

8. Example 4:

9. Example 5:

10. Example 6:

11. Example 7 You try! Raise your hand when you are done! First person done with the correct answer will earn a math buck!$$$

13. Example 8 You try! Raise your hand when you are done! First person done with the correct answer will earn a math buck!$$$

15. Example 9 You try! Raise your hand when you are done! First person done with the correct answer will earn a math buck!$$$

17. Example 10 You try! Raise your hand when you are done! First person done with the correct answer will earn a math buck!$$$

19. Example 11 You try! Raise your hand when you are done! First person done with the correct answer will earn a math buck!$$$

21. Assignment: Page 448 (2-34) even