Addition and Subtraction Worksheets for Grade 3 with Answer Key - Free Printable
Educational worksheet: Addition and Subtraction Worksheets for Grade 3 with Answer Key. Download and print for classroom or home learning activities.
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Step-by-step solution for: Addition and Subtraction Worksheets for Grade 3 with Answer Key
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Show Answer Key & Explanations
Step-by-step solution for: Addition and Subtraction Worksheets for Grade 3 with Answer Key
You're working on Addition & Subtraction with No Regrouping — meaning you add or subtract each digit column-by-column (ones, tens, hundreds) without needing to borrow or carry over.
Let’s solve each problem step by step and explain the reasoning.
---
① 330 + 623
- Ones: 0 + 3 = 3
- Tens: 3 + 2 = 5
- Hundreds: 3 + 6 = 9
✔ Answer: 953
---
② 126 + 243
- Ones: 6 + 3 = 9
- Tens: 2 + 4 = 6
- Hundreds: 1 + 2 = 3
✔ Answer: 369
---
③ 373 – 111
- Ones: 3 – 1 = 2
- Tens: 7 – 1 = 6
- Hundreds: 3 – 1 = 2
✔ Answer: 262
---
④ 662 – 331
- Ones: 2 – 1 = 1
- Tens: 6 – 3 = 3
- Hundreds: 6 – 3 = 3
✔ Answer: 331
---
⑤ 359 – 210
- Ones: 9 – 0 = 9
- Tens: 5 – 1 = 4
- Hundreds: 3 – 2 = 1
✔ Answer: 149
---
⑥ 412 – 321
- Ones: 2 – 1 = 1
- Tens: 1 – 2 → ❗Wait! 1 < 2 — but the worksheet says “No Regrouping”. So this might be a trick? Let’s check: actually, this requires regrouping — but since the title says “No Regrouping”, maybe it's an error? Or perhaps we proceed as if no regrouping is needed? But mathematically, 1 – 2 can’t be done without borrowing.
Wait — let’s double-check: Is this really possible without regrouping?
Actually, no, 412 – 321 requires regrouping in the tens place. But since the worksheet says “No Regrouping”, maybe it’s a mistake? Or perhaps we’re supposed to do it anyway?
But looking at the rest of the problems, most are designed so that each digit in the top number is ≥ the bottom digit — except this one.
Let’s assume it’s a typo or misplacement, and continue solving as intended — perhaps the problem was meant to be 421 – 321 or something else.
But since you asked to solve the problem as given, I’ll solve it correctly (with regrouping), then note the issue.
➡️ Correct Answer (with regrouping):
412 – 321 = 91
But since the worksheet says “No Regrouping”, and this problem breaks that rule, it may be an error. We’ll mark it as such.
✔ Answer: 91 *(but requires regrouping — contradicts worksheet title)*
---
⑦ 666 + 333
- Ones: 6 + 3 = 9
- Tens: 6 + 3 = 9
- Hundreds: 6 + 3 = 9
✔ Answer: 999
---
⑧ 340 – 222
- Ones: 0 – 2 → Again, needs regrouping! ❗
Same issue — 0 < 2, so we must borrow. But worksheet says “No Regrouping”.
This also breaks the rule.
➡️ Correct answer: 340 – 222 = 118
✔ Answer: 118 *(requires regrouping — contradiction)*
---
⑨ 106 + 442
- Ones: 6 + 2 = 8
- Tens: 0 + 4 = 4
- Hundreds: 1 + 4 = 5
✔ Answer: 548
*(No regrouping needed here — good!)*
---
⑩ 717 – 213
- Ones: 7 – 3 = 4
- Tens: 1 – 1 = 0
- Hundreds: 7 – 2 = 5
✔ Answer: 504
---
⑪ 634 – 235
- Ones: 4 – 5 → Needs regrouping ❗
Again, violates “No Regrouping”
➡️ Correct answer: 634 – 235 = 399
✔ Answer: 399 *(requires regrouping)*
---
⑫ 334 + 100
- Ones: 4 + 0 = 4
- Tens: 3 + 0 = 3
- Hundreds: 3 + 1 = 4
✔ Answer: 434
---
⑬ 500 – 200
- Ones: 0 – 0 = 0
- Tens: 0 – 0 = 0
- Hundreds: 5 – 2 = 3
✔ Answer: 300
---
⑭ 510 – 320
- Ones: 0 – 0 = 0
- Tens: 1 – 2 → Needs regrouping ❗
Again, problem violates “No Regrouping”
➡️ Correct: 510 – 320 = 190
✔ Answer: 190 *(requires regrouping)*
---
⑮ 712 + 223
- Ones: 2 + 3 = 5
- Tens: 1 + 2 = 3
- Hundreds: 7 + 2 = 9
✔ Answer: 935
---
⑯ 322 + 571
- Ones: 2 + 1 = 3
- Tens: 2 + 7 = 9
- Hundreds: 3 + 5 = 8
✔ Answer: 893
---
⑰ 259 + 340
- Ones: 9 + 0 = 9
- Tens: 5 + 4 = 9
- Hundreds: 2 + 3 = 5
✔ Answer: 599
---
⑱ 703 – 202
- Ones: 3 – 2 = 1
- Tens: 0 – 0 = 0
- Hundreds: 7 – 2 = 5
✔ Answer: 501
---
⑲ 227 + 141
- Ones: 7 + 1 = 8
- Tens: 2 + 4 = 6
- Hundreds: 2 + 1 = 3
✔ Answer: 368
---
⑳ 354 + 122
- Ones: 4 + 2 = 6
- Tens: 5 + 2 = 7
- Hundreds: 3 + 1 = 4
✔ Answer: 476
---
㉑ 627 – 251
- Ones: 7 – 1 = 6
- Tens: 2 – 5 → Needs regrouping ❗
Again, violates “No Regrouping”
➡️ Correct: 627 – 251 = 376
✔ Answer: 376 *(requires regrouping)*
---
㉒ 852 – 122
- Ones: 2 – 2 = 0
- Tens: 5 – 2 = 3
- Hundreds: 8 – 1 = 7
✔ Answer: 730
---
㉓ 162 – 104
- Ones: 2 – 4 → Needs regrouping ❗
➡️ Correct: 162 – 104 = 58
✔ Answer: 58 *(requires regrouping)*
---
㉔ 234 + 523
- Ones: 4 + 3 = 7
- Tens: 3 + 2 = 5
- Hundreds: 2 + 5 = 7
✔ Answer: 757
---
㉕ 555 – 333
- Ones: 5 – 3 = 2
- Tens: 5 – 3 = 2
- Hundreds: 5 – 3 = 2
✔ Answer: 222
---
## ✔ Final Answers (in order):
1. 953
2. 369
3. 262
4. 331
5. 149
6. 91 *(regrouping needed — exception)*
7. 999
8. 118 *(regrouping needed — exception)*
9. 548
10. 504
11. 399 *(regrouping needed — exception)*
12. 434
13. 300
14. 190 *(regrouping needed — exception)*
15. 935
16. 893
17. 599
18. 501
19. 368
20. 476
21. 376 *(regrouping needed — exception)*
22. 730
23. 58 *(regrouping needed — exception)*
24. 757
25. 222
---
## 📝 Note:
The worksheet title says "No Regrouping", but several problems (6, 8, 11, 14, 21, 23) require regrouping. This may be an error in the worksheet design. In a true “no regrouping” exercise, every digit in the top number should be greater than or equal to the corresponding digit in the bottom number.
If this is for practice, you’ve now solved all correctly — just be aware of the inconsistency.
Let me know if you’d like a corrected version of the worksheet with only no-regrouping problems! 😊
Let’s solve each problem step by step and explain the reasoning.
---
🔢 Problems 1–5
① 330 + 623
- Ones: 0 + 3 = 3
- Tens: 3 + 2 = 5
- Hundreds: 3 + 6 = 9
✔ Answer: 953
---
② 126 + 243
- Ones: 6 + 3 = 9
- Tens: 2 + 4 = 6
- Hundreds: 1 + 2 = 3
✔ Answer: 369
---
③ 373 – 111
- Ones: 3 – 1 = 2
- Tens: 7 – 1 = 6
- Hundreds: 3 – 1 = 2
✔ Answer: 262
---
④ 662 – 331
- Ones: 2 – 1 = 1
- Tens: 6 – 3 = 3
- Hundreds: 6 – 3 = 3
✔ Answer: 331
---
⑤ 359 – 210
- Ones: 9 – 0 = 9
- Tens: 5 – 1 = 4
- Hundreds: 3 – 2 = 1
✔ Answer: 149
---
🔢 Problems 6–10
⑥ 412 – 321
- Ones: 2 – 1 = 1
- Tens: 1 – 2 → ❗Wait! 1 < 2 — but the worksheet says “No Regrouping”. So this might be a trick? Let’s check: actually, this requires regrouping — but since the title says “No Regrouping”, maybe it's an error? Or perhaps we proceed as if no regrouping is needed? But mathematically, 1 – 2 can’t be done without borrowing.
Wait — let’s double-check: Is this really possible without regrouping?
Actually, no, 412 – 321 requires regrouping in the tens place. But since the worksheet says “No Regrouping”, maybe it’s a mistake? Or perhaps we’re supposed to do it anyway?
But looking at the rest of the problems, most are designed so that each digit in the top number is ≥ the bottom digit — except this one.
Let’s assume it’s a typo or misplacement, and continue solving as intended — perhaps the problem was meant to be 421 – 321 or something else.
But since you asked to solve the problem as given, I’ll solve it correctly (with regrouping), then note the issue.
➡️ Correct Answer (with regrouping):
412 – 321 = 91
But since the worksheet says “No Regrouping”, and this problem breaks that rule, it may be an error. We’ll mark it as such.
✔ Answer: 91 *(but requires regrouping — contradicts worksheet title)*
---
⑦ 666 + 333
- Ones: 6 + 3 = 9
- Tens: 6 + 3 = 9
- Hundreds: 6 + 3 = 9
✔ Answer: 999
---
⑧ 340 – 222
- Ones: 0 – 2 → Again, needs regrouping! ❗
Same issue — 0 < 2, so we must borrow. But worksheet says “No Regrouping”.
This also breaks the rule.
➡️ Correct answer: 340 – 222 = 118
✔ Answer: 118 *(requires regrouping — contradiction)*
---
⑨ 106 + 442
- Ones: 6 + 2 = 8
- Tens: 0 + 4 = 4
- Hundreds: 1 + 4 = 5
✔ Answer: 548
*(No regrouping needed here — good!)*
---
⑩ 717 – 213
- Ones: 7 – 3 = 4
- Tens: 1 – 1 = 0
- Hundreds: 7 – 2 = 5
✔ Answer: 504
---
🔢 Problems 11–15
⑪ 634 – 235
- Ones: 4 – 5 → Needs regrouping ❗
Again, violates “No Regrouping”
➡️ Correct answer: 634 – 235 = 399
✔ Answer: 399 *(requires regrouping)*
---
⑫ 334 + 100
- Ones: 4 + 0 = 4
- Tens: 3 + 0 = 3
- Hundreds: 3 + 1 = 4
✔ Answer: 434
---
⑬ 500 – 200
- Ones: 0 – 0 = 0
- Tens: 0 – 0 = 0
- Hundreds: 5 – 2 = 3
✔ Answer: 300
---
⑭ 510 – 320
- Ones: 0 – 0 = 0
- Tens: 1 – 2 → Needs regrouping ❗
Again, problem violates “No Regrouping”
➡️ Correct: 510 – 320 = 190
✔ Answer: 190 *(requires regrouping)*
---
⑮ 712 + 223
- Ones: 2 + 3 = 5
- Tens: 1 + 2 = 3
- Hundreds: 7 + 2 = 9
✔ Answer: 935
---
🔢 Problems 16–20
⑯ 322 + 571
- Ones: 2 + 1 = 3
- Tens: 2 + 7 = 9
- Hundreds: 3 + 5 = 8
✔ Answer: 893
---
⑰ 259 + 340
- Ones: 9 + 0 = 9
- Tens: 5 + 4 = 9
- Hundreds: 2 + 3 = 5
✔ Answer: 599
---
⑱ 703 – 202
- Ones: 3 – 2 = 1
- Tens: 0 – 0 = 0
- Hundreds: 7 – 2 = 5
✔ Answer: 501
---
⑲ 227 + 141
- Ones: 7 + 1 = 8
- Tens: 2 + 4 = 6
- Hundreds: 2 + 1 = 3
✔ Answer: 368
---
⑳ 354 + 122
- Ones: 4 + 2 = 6
- Tens: 5 + 2 = 7
- Hundreds: 3 + 1 = 4
✔ Answer: 476
---
🔢 Problems 21–25
㉑ 627 – 251
- Ones: 7 – 1 = 6
- Tens: 2 – 5 → Needs regrouping ❗
Again, violates “No Regrouping”
➡️ Correct: 627 – 251 = 376
✔ Answer: 376 *(requires regrouping)*
---
㉒ 852 – 122
- Ones: 2 – 2 = 0
- Tens: 5 – 2 = 3
- Hundreds: 8 – 1 = 7
✔ Answer: 730
---
㉓ 162 – 104
- Ones: 2 – 4 → Needs regrouping ❗
➡️ Correct: 162 – 104 = 58
✔ Answer: 58 *(requires regrouping)*
---
㉔ 234 + 523
- Ones: 4 + 3 = 7
- Tens: 3 + 2 = 5
- Hundreds: 2 + 5 = 7
✔ Answer: 757
---
㉕ 555 – 333
- Ones: 5 – 3 = 2
- Tens: 5 – 3 = 2
- Hundreds: 5 – 3 = 2
✔ Answer: 222
---
## ✔ Final Answers (in order):
1. 953
2. 369
3. 262
4. 331
5. 149
6. 91 *(regrouping needed — exception)*
7. 999
8. 118 *(regrouping needed — exception)*
9. 548
10. 504
11. 399 *(regrouping needed — exception)*
12. 434
13. 300
14. 190 *(regrouping needed — exception)*
15. 935
16. 893
17. 599
18. 501
19. 368
20. 476
21. 376 *(regrouping needed — exception)*
22. 730
23. 58 *(regrouping needed — exception)*
24. 757
25. 222
---
## 📝 Note:
The worksheet title says "No Regrouping", but several problems (6, 8, 11, 14, 21, 23) require regrouping. This may be an error in the worksheet design. In a true “no regrouping” exercise, every digit in the top number should be greater than or equal to the corresponding digit in the bottom number.
If this is for practice, you’ve now solved all correctly — just be aware of the inconsistency.
Let me know if you’d like a corrected version of the worksheet with only no-regrouping problems! 😊
Parent Tip: Review the logic above to help your child master the concept of addition and subtraction worksheet 3rd grade.
