1. Adding and Subtracting Unlike Fractions
Section 4.5
Adding and Subtracting Unlike Fractions

2. Adding and Subtracting Unlike Fractions
Steps
Find the least common denominator (LCD) for the fractions.
Write each fraction as an equivalent fraction using the LCD as the new denominator.
Add or subtract the like fractions
Reduce

3. Example
Combine the fractions −

4. Example
Combine the fractions − 5 18

5. Example
Combine the fractions −3 8 − 5 48

6. Example
Combine the fractions

7. Example
Combine the fractions 𝑥 3 − 𝑥 12

8. Example
Combine the fractions 6 5 −

9. Example
Combine the fractions −2 3 −

10. Example
Combine the fractions 3𝑥 8 + 2𝑥 7 − 5 14