Practice: Fraction Operations

Part A: Adding Fractions with Unlike Denominators

Directions: Find the sum. Remember to find the LCD first, then simplify your answer if possible.

1. 13 + 14 =

2. 25 + 12 =

3. 34 + 16 =

4. 23 + 35 =

Directions: Find the difference. Remember to find the LCD first, then simplify your answer if possible.

5. 34 - 12 =

6. 56 - 13 =

7. 78 - 14 =

8. 45 - 13 =

Directions: Add or subtract. Show your work in the space provided.

9. 12 + 25 + 110 =

10. 78 - 23 =

11. 114 + 23 =

12. 212 - 34 =

Directions: Read each problem. Write an equation and solve.

13. Maria used 2/3 cup of flour for cookies and 1/4 cup of flour for muffins. How much flour did she use in all?

Equation: _________________________________

Answer: Maria used _____________ cups of flour.

14. Jake had 7/8 of a pizza. He ate 1/4 of the pizza. How much pizza is left?

Equation: _________________________________

Answer: There is _____________ of the pizza left.

15. Sophia walked 3/4 of a mile to school and 2/5 of a mile to the library. How much farther did she walk to school than to the library?

Equation: _________________________________

Answer: She walked _____________ mile farther to school.

16. A recipe calls for 1/2 cup of sugar and 3/8 cup of brown sugar. What is the total amount of sugar needed?

Equation: _________________________________

Answer: The recipe needs _____________ cups of sugar total.

17. Without calculating, will 56 + 23 be greater than 1 or less than 1? Explain how you know.

18. Find two fractions with different denominators that have a sum of exactly 1.

+ = 1