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Subtraction Check with Addition

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Subtraction Check with Addition

Subtraction Check with Addition

Student checking subtraction with addition

🧮 Part 1: Subtraction Problems

Instructions: Solve each subtraction problem, then check your answer by adding.

1. 456 - 234 = _______

Check: _______ + 234 = 456

2. 789 - 456 = _______

Check: _______ + 456 = 789

3. 635 - 423 = _______

Check: _______ + 423 = 635

4. 847 - 325 = _______

Check: _______ + 325 = 847

✅ Part 2: Check These Answers

Instructions: Use addition to check if these subtraction answers are correct. Circle "Correct" or "Incorrect".

5. 567 - 234 = 333

Check: 333 + 234 = _______

Correct

Incorrect

6. 892 - 461 = 431

Check: 431 + 461 = _______

Correct

Incorrect

7. 758 - 326 = 432

Check: 432 + 326 = _______

Correct

Incorrect

🔢 Part 3: Larger Numbers

Instructions: Solve these subtraction problems with larger numbers and check your work.

8. 945 - 623 = _______

Check: _______ + 623 = 945

9. 876 - 542 = _______

Check: _______ + 542 = 876

10. 693 - 271 = _______

Check: _______ + 271 = 693

🎯 Part 4: Word Problems

Instructions: Read each problem, write the subtraction equation, solve it, and check with addition.

11. A school has 864 students. 432 students are in the junior school. How many students are in the senior school?

Subtraction equation: ________________

Answer: _______ students

Check: _______ + 432 = 864

12. A library had 756 books. They donated 324 books to another school. How many books do they have left?

Subtraction equation: ________________

Answer: _______ books

Check: _______ + 324 = 756

💭 Part 5: Reflection

13. Explain in your own words why we can use addition to check subtraction:
14. Which method do you find easier for checking your subtraction work? Tick all that apply:

Adding the answer to the number being subtracted

Doing the subtraction problem again

Using a calculator

Counting backwards

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