1. Fractions: Adding and Subtracting Like Denominators

2. 3 4 Parts of a Fraction = the number of parts
= the total number of parts that equal a whole

3. Parts of a Fraction 3
= numerator 4
= denominator

4. Adding Like Denominators
Only add the numerators
1/4
1/4 3 1 4 + = 4 4 4
1/4
1/4

5. Add these fractions
1/5
1/5 3 1 4 + =
1/5 5 5 5
1/5

6. Add these fractions
1/4
1/4 2 1 3 + = 4 4 4
1/4

7. Add these fractions 1 1 1 6 6 6 3 2 5 + = 6 6 6 1 1 6 6

8. Add these fractions 1 1 1 6 6 6 2 2 4 + = 6 6 6 1 6

9. Add these fractions 5 3 8 + = 12 12 12

10. Add these fractions 1 3 4 + = 10 10 10

11. Add these fractions 4 3 7 + = 4 4 9 9 9

12. Add these fractions 3 1 4 + = 5 5 8 8 8

13. Add these fractions 2 1 3 + 4 3 = 7 9 9 9

14. Subtracting Like Denominators
Only subtract the numerators
1/4
1/4 4 1 3 - = 4 4 4
1/4
1/4

15. Subtract these fractions8 5 3 - = 12 12 12

16. Subtract these fractions7 3 4 - = 10 10 10

17. Subtract these fractions5 3 2 - = 6 6 6