1. 11.6 Addition and Subtraction: Unlike Denominators

2. #1 Finding the LCD 12, 24, 36, 48, 60, 72, 84, 96,.. 15, 30, 45, 60, 75, 90, …

3. #2 Finding the LCD

4. What can you do if you can’t figure out the LCD a. Just multiply each term by the other denominator to the top and bottom. EX: The only draw-back of this would be that you will probably have to simplify at the end!!

5. Fraction Rule (Addition and Subtraction) 3. 4. LCD = 12 LCD = 15

6. #5 Add or subtract. Simplify

7. #6 Add or subtract. Simplify

8. #7 Add or subtract. Simplify

9. #8 Add or subtract. Simplify

10. Add or Subtract. Simplify.      