1. Fraction Addition

2. Try some 4 / 5 + 3 / 5

3. Apples and Oranges The things you add have to be the same size

4. Common Denominator

5. A number all original denominators divide into evenly 12 is a common denominator because 3 and 4 both divide 12 evenly.

6. Least Common Denominator To find the least common denominator –Write the times table list for each denominator –The smallest number that is in all rows is the least common denominator

7. Least Common Denominator To find the least common denominator –Write the times table list for each denominator –The smallest number that is in all rows is the least common denominator

8. Try One Find the common denominator for these fractions A) 2 / 3 + 3 / 5 B) ¾ + 7 / 12 C) 2 / 5 + 3 / 8 + 7 / 10

9. Addition Find a common denominator Multiply numerator and denominator by the same number Add Simplify

10. Addition Find a common denominator Multiply numerator and denominator by the same number Add Simplify

11. Addition Find a common denominator Multiply numerator and denominator by the same number Add Simplify

12. Try one