Practice: Adding & Subtracting Decimals

Part A: Adding Decimals

Directions: Add. Show your work by lining up the decimal points. Remember to add zeros as placeholders if needed.

1. 3.4 + 5.28

2. 7.65 + 2.8

3. 12.5 + 4.375

4. 0.456 + 3.7

Directions: Subtract. Show your work. Remember to regroup (borrow) when needed.

5. 8.7 - 3.45

6. 15.2 - 8.67

7. 10 - 4.375

8. 6.004 - 2.58

Directions: Add or subtract. Pay attention to the operation sign!

9. 9.25 + 3.8

10. 14.6 - 7.82

11. 5.008 + 12.99

Directions: Read each problem carefully. Show your work and write your answer with correct units.

12. Tyler ran 3.75 miles on Monday and 4.2 miles on Tuesday. How many total miles did Tyler run?

Answer: _____________ miles

13. Samantha had $20.00. She bought a book for $12.85. How much money does she have left?

Answer: $____________

14. A piece of ribbon is 8.5 meters long. Jayla cuts off 2.375 meters. How much ribbon is left?

Answer: _____________ meters

15. Jake solved 7.3 - 2.85 and got 4.55. Use estimation to explain whether his answer is reasonable.

16. Find the missing number: 5.6 + _____ = 12.45

Missing number: