Addition and Subtraction with Regrouping Worksheets with Answer Key - Free Printable
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Step-by-step solution for: Addition and Subtraction with Regrouping Worksheets with Answer Key
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Show Answer Key & Explanations
Step-by-step solution for: Addition and Subtraction with Regrouping Worksheets with Answer Key
Let’s solve each problem one by one. We’ll do the math carefully, step by step, and check our work as we go.
---
Problem 1: 292 + 924
Add ones: 2 + 4 = 6
Add tens: 9 + 2 = 11 → write down 1, carry over 1 to hundreds
Add hundreds: 2 + 9 + 1 (carry) = 12 → write down 12
→ 1216
Check: 292 + 924 = 1216 ✔
---
Problem 2: 517 - 189
Ones: 7 - 9 → can’t do, borrow from tens. Tens is 1, so borrow from hundreds.
Hundreds: 5 becomes 4, tens become 11. Now borrow 1 ten for ones → tens become 10, ones become 17.
Now: 17 - 9 = 8
Tens: 10 - 8 = 2
Hundreds: 4 - 1 = 3
→ 328
Check: 189 + 328 = 517 ✔
---
Problem 3: 247 - 178
Ones: 7 - 8 → borrow. Tens is 4 → becomes 3, ones become 17.
17 - 8 = 9
Tens: 3 - 7 → can’t do, borrow from hundreds. Hundreds 2 → 1, tens become 13.
13 - 7 = 6
Hundreds: 1 - 1 = 0
→ 69
Check: 178 + 69 = 247 ✔
---
Problem 4: 679 + 238
Ones: 9 + 8 = 17 → write 7, carry 1
Tens: 7 + 3 + 1 = 11 → write 1, carry 1
Hundreds: 6 + 2 + 1 = 9
→ 917
Check: 679 + 238 = 917 ✔
---
Problem 5: 677 - 369
Ones: 7 - 9 → borrow. Tens 7 → 6, ones 17.
17 - 9 = 8
Tens: 6 - 6 = 0
Hundreds: 6 - 3 = 3
→ 308
Check: 369 + 308 = 677 ✔
---
Problem 6: 271 + 399
Ones: 1 + 9 = 10 → write 0, carry 1
Tens: 7 + 9 + 1 = 17 → write 7, carry 1
Hundreds: 2 + 3 + 1 = 6
→ 670
Check: 271 + 399 = 670 ✔
---
Problem 7: 457 + 469
Ones: 7 + 9 = 16 → write 6, carry 1
Tens: 5 + 6 + 1 = 12 → write 2, carry 1
Hundreds: 4 + 4 + 1 = 9
→ 926
Check: 457 + 469 = 926 ✔
---
Problem 8: 228 - 119
Ones: 8 - 9 → borrow. Tens 2 → 1, ones 18.
18 - 9 = 9
Tens: 1 - 1 = 0
Hundreds: 2 - 1 = 1
→ 109
Check: 119 + 109 = 228 ✔
---
Problem 9: 534 + 392
Ones: 4 + 2 = 6
Tens: 3 + 9 = 12 → write 2, carry 1
Hundreds: 5 + 3 + 1 = 9
→ 926
Check: 534 + 392 = 926 ✔
---
Problem 10: 198 + 233
Ones: 8 + 3 = 11 → write 1, carry 1
Tens: 9 + 3 + 1 = 13 → write 3, carry 1
Hundreds: 1 + 2 + 1 = 4
→ 431
Check: 198 + 233 = 431 ✔
---
Problem 11: 448 - 229
Ones: 8 - 9 → borrow. Tens 4 → 3, ones 18.
18 - 9 = 9
Tens: 3 - 2 = 1
Hundreds: 4 - 2 = 2
→ 219
Check: 229 + 219 = 448 ✔
---
Problem 12: 397 - 188
Ones: 7 - 8 → borrow. Tens 9 → 8, ones 17.
17 - 8 = 9
Tens: 8 - 8 = 0
Hundreds: 3 - 1 = 2
→ 209
Check: 188 + 209 = 397 ✔
---
Problem 13: 679 + 443
Ones: 9 + 3 = 12 → write 2, carry 1
Tens: 7 + 4 + 1 = 12 → write 2, carry 1
Hundreds: 6 + 4 + 1 = 11
→ 1122
Check: 679 + 443 = 1122 ✔
---
Problem 14: 662 - 398
Ones: 2 - 8 → borrow. Tens 6 → 5, ones 12.
12 - 8 = 4
Tens: 5 - 9 → borrow. Hundreds 6 → 5, tens 15.
15 - 9 = 6
Hundreds: 5 - 3 = 2
→ 264
Check: 398 + 264 = 662 ✔
---
Problem 15: 367 - 199
Ones: 7 - 9 → borrow. Tens 6 → 5, ones 17.
17 - 9 = 8
Tens: 5 - 9 → borrow. Hundreds 3 → 2, tens 15.
15 - 9 = 6
Hundreds: 2 - 1 = 1
→ 168
Check: 199 + 168 = 367 ✔
---
Problem 16: 558 + 344
Ones: 8 + 4 = 12 → write 2, carry 1
Tens: 5 + 4 + 1 = 10 → write 0, carry 1
Hundreds: 5 + 3 + 1 = 9
→ 902
Check: 558 + 344 = 902 ✔
---
Problem 17: 672 + 929
Ones: 2 + 9 = 11 → write 1, carry 1
Tens: 7 + 2 + 1 = 10 → write 0, carry 1
Hundreds: 6 + 9 + 1 = 16
→ 1601
Check: 672 + 929 = 1601 ✔
---
Problem 18: 777 - 229
Ones: 7 - 9 → borrow. Tens 7 → 6, ones 17.
17 - 9 = 8
Tens: 6 - 2 = 4
Hundreds: 7 - 2 = 5
→ 548
Check: 229 + 548 = 777 ✔
---
Problem 19: 888 - 379
Ones: 8 - 9 → borrow. Tens 8 → 7, ones 18.
18 - 9 = 9
Tens: 7 - 7 = 0
Hundreds: 8 - 3 = 5
→ 509
Check: 379 + 509 = 888 ✔
---
Problem 20: 928 - 339
Ones: 8 - 9 → borrow. Tens 2 → 1, ones 18.
18 - 9 = 9
Tens: 1 - 3 → borrow. Hundreds 9 → 8, tens 11.
11 - 3 = 8
Hundreds: 8 - 3 = 5
→ 589
Check: 339 + 589 = 928 ✔
---
Final Answer:
1. 1216
2. 328
3. 69
4. 917
5. 308
6. 670
7. 926
8. 109
9. 926
10. 431
11. 219
12. 209
13. 1122
14. 264
15. 168
16. 902
17. 1601
18. 548
19. 509
20. 589
---
Problem 1: 292 + 924
Add ones: 2 + 4 = 6
Add tens: 9 + 2 = 11 → write down 1, carry over 1 to hundreds
Add hundreds: 2 + 9 + 1 (carry) = 12 → write down 12
→ 1216
Check: 292 + 924 = 1216 ✔
---
Problem 2: 517 - 189
Ones: 7 - 9 → can’t do, borrow from tens. Tens is 1, so borrow from hundreds.
Hundreds: 5 becomes 4, tens become 11. Now borrow 1 ten for ones → tens become 10, ones become 17.
Now: 17 - 9 = 8
Tens: 10 - 8 = 2
Hundreds: 4 - 1 = 3
→ 328
Check: 189 + 328 = 517 ✔
---
Problem 3: 247 - 178
Ones: 7 - 8 → borrow. Tens is 4 → becomes 3, ones become 17.
17 - 8 = 9
Tens: 3 - 7 → can’t do, borrow from hundreds. Hundreds 2 → 1, tens become 13.
13 - 7 = 6
Hundreds: 1 - 1 = 0
→ 69
Check: 178 + 69 = 247 ✔
---
Problem 4: 679 + 238
Ones: 9 + 8 = 17 → write 7, carry 1
Tens: 7 + 3 + 1 = 11 → write 1, carry 1
Hundreds: 6 + 2 + 1 = 9
→ 917
Check: 679 + 238 = 917 ✔
---
Problem 5: 677 - 369
Ones: 7 - 9 → borrow. Tens 7 → 6, ones 17.
17 - 9 = 8
Tens: 6 - 6 = 0
Hundreds: 6 - 3 = 3
→ 308
Check: 369 + 308 = 677 ✔
---
Problem 6: 271 + 399
Ones: 1 + 9 = 10 → write 0, carry 1
Tens: 7 + 9 + 1 = 17 → write 7, carry 1
Hundreds: 2 + 3 + 1 = 6
→ 670
Check: 271 + 399 = 670 ✔
---
Problem 7: 457 + 469
Ones: 7 + 9 = 16 → write 6, carry 1
Tens: 5 + 6 + 1 = 12 → write 2, carry 1
Hundreds: 4 + 4 + 1 = 9
→ 926
Check: 457 + 469 = 926 ✔
---
Problem 8: 228 - 119
Ones: 8 - 9 → borrow. Tens 2 → 1, ones 18.
18 - 9 = 9
Tens: 1 - 1 = 0
Hundreds: 2 - 1 = 1
→ 109
Check: 119 + 109 = 228 ✔
---
Problem 9: 534 + 392
Ones: 4 + 2 = 6
Tens: 3 + 9 = 12 → write 2, carry 1
Hundreds: 5 + 3 + 1 = 9
→ 926
Check: 534 + 392 = 926 ✔
---
Problem 10: 198 + 233
Ones: 8 + 3 = 11 → write 1, carry 1
Tens: 9 + 3 + 1 = 13 → write 3, carry 1
Hundreds: 1 + 2 + 1 = 4
→ 431
Check: 198 + 233 = 431 ✔
---
Problem 11: 448 - 229
Ones: 8 - 9 → borrow. Tens 4 → 3, ones 18.
18 - 9 = 9
Tens: 3 - 2 = 1
Hundreds: 4 - 2 = 2
→ 219
Check: 229 + 219 = 448 ✔
---
Problem 12: 397 - 188
Ones: 7 - 8 → borrow. Tens 9 → 8, ones 17.
17 - 8 = 9
Tens: 8 - 8 = 0
Hundreds: 3 - 1 = 2
→ 209
Check: 188 + 209 = 397 ✔
---
Problem 13: 679 + 443
Ones: 9 + 3 = 12 → write 2, carry 1
Tens: 7 + 4 + 1 = 12 → write 2, carry 1
Hundreds: 6 + 4 + 1 = 11
→ 1122
Check: 679 + 443 = 1122 ✔
---
Problem 14: 662 - 398
Ones: 2 - 8 → borrow. Tens 6 → 5, ones 12.
12 - 8 = 4
Tens: 5 - 9 → borrow. Hundreds 6 → 5, tens 15.
15 - 9 = 6
Hundreds: 5 - 3 = 2
→ 264
Check: 398 + 264 = 662 ✔
---
Problem 15: 367 - 199
Ones: 7 - 9 → borrow. Tens 6 → 5, ones 17.
17 - 9 = 8
Tens: 5 - 9 → borrow. Hundreds 3 → 2, tens 15.
15 - 9 = 6
Hundreds: 2 - 1 = 1
→ 168
Check: 199 + 168 = 367 ✔
---
Problem 16: 558 + 344
Ones: 8 + 4 = 12 → write 2, carry 1
Tens: 5 + 4 + 1 = 10 → write 0, carry 1
Hundreds: 5 + 3 + 1 = 9
→ 902
Check: 558 + 344 = 902 ✔
---
Problem 17: 672 + 929
Ones: 2 + 9 = 11 → write 1, carry 1
Tens: 7 + 2 + 1 = 10 → write 0, carry 1
Hundreds: 6 + 9 + 1 = 16
→ 1601
Check: 672 + 929 = 1601 ✔
---
Problem 18: 777 - 229
Ones: 7 - 9 → borrow. Tens 7 → 6, ones 17.
17 - 9 = 8
Tens: 6 - 2 = 4
Hundreds: 7 - 2 = 5
→ 548
Check: 229 + 548 = 777 ✔
---
Problem 19: 888 - 379
Ones: 8 - 9 → borrow. Tens 8 → 7, ones 18.
18 - 9 = 9
Tens: 7 - 7 = 0
Hundreds: 8 - 3 = 5
→ 509
Check: 379 + 509 = 888 ✔
---
Problem 20: 928 - 339
Ones: 8 - 9 → borrow. Tens 2 → 1, ones 18.
18 - 9 = 9
Tens: 1 - 3 → borrow. Hundreds 9 → 8, tens 11.
11 - 3 = 8
Hundreds: 8 - 3 = 5
→ 589
Check: 339 + 589 = 928 ✔
---
Final Answer:
1. 1216
2. 328
3. 69
4. 917
5. 308
6. 670
7. 926
8. 109
9. 926
10. 431
11. 219
12. 209
13. 1122
14. 264
15. 168
16. 902
17. 1601
18. 548
19. 509
20. 589
Parent Tip: Review the logic above to help your child master the concept of 3 digit subtraction regrouping worksheet 3rd grade.
