Let's solve each of the addition problems with regrouping step by step. The goal is to add two numbers and handle carrying over (regrouping) when the sum in any column exceeds 9.
---
1. 446 + 499
```
446
+ 499
-----
```
- Units: 6 + 9 = 15 → write 5, carry 1
- Tens: 4 + 9 + 1 = 14 → write 4, carry 1
- Hundreds: 4 + 4 + 1 = 9
→
945
---
2. 578 + 349
```
578
+ 349
-----
```
- Units: 8 + 9 = 17 → write 7, carry 1
- Tens: 7 + 4 + 1 = 12 → write 2, carry 1
- Hundreds: 5 + 3 + 1 = 9
→
927
---
3. 383 + 609
```
383
+ 609
-----
```
- Units: 3 + 9 = 12 → write 2, carry 1
- Tens: 8 + 0 + 1 = 9
- Hundreds: 3 + 6 = 9
→
992
---
4. 525 + 79
```
525
+ 79
-----
```
- Units: 5 + 9 = 14 → write 4, carry 1
- Tens: 2 + 7 + 1 = 10 → write 0, carry 1
- Hundreds: 5 + 0 + 1 = 6
→
604
---
5. 347 + 385
```
347
+ 385
-----
```
- Units: 7 + 5 = 12 → write 2, carry 1
- Tens: 4 + 8 + 1 = 13 → write 3, carry 1
- Hundreds: 3 + 3 + 1 = 7
→
732
---
6. 108 + 794
```
108
+ 794
-----
```
- Units: 8 + 4 = 12 → write 2, carry 1
- Tens: 0 + 9 + 1 = 10 → write 0, carry 1
- Hundreds: 1 + 7 + 1 = 9
→
902
---
7. 869 + 39
```
869
+ 39
-----
```
- Units: 9 + 9 = 18 → write 8, carry 1
- Tens: 6 + 3 + 1 = 10 → write 0, carry 1
- Hundreds: 8 + 0 + 1 = 9
→
908
---
8. 686 + 338
```
686
+ 338
-----
```
- Units: 6 + 8 = 14 → write 4, carry 1
- Tens: 8 + 3 + 1 = 12 → write 2, carry 1
- Hundreds: 6 + 3 + 1 = 10
→
1024
---
9. 589 + 483
```
589
+ 483
-----
```
- Units: 9 + 3 = 12 → write 2, carry 1
- Tens: 8 + 8 + 1 = 17 → write 7, carry 1
- Hundreds: 5 + 4 + 1 = 10
→
1072
---
10. 760 + 159
```
760
+ 159
-----
```
- Units: 0 + 9 = 9
- Tens: 6 + 5 = 11 → write 1, carry 1
- Hundreds: 7 + 1 + 1 = 9
→
919
---
11. 355 + 609
```
355
+ 609
-----
```
- Units: 5 + 9 = 14 → write 4, carry 1
- Tens: 5 + 0 + 1 = 6
- Hundreds: 3 + 6 = 9
→
964
---
12. 276 + 589
```
276
+ 589
-----
```
- Units: 6 + 9 = 15 → write 5, carry 1
- Tens: 7 + 8 + 1 = 16 → write 6, carry 1
- Hundreds: 2 + 5 + 1 = 8
→
865
---
13. 548 + 379
```
548
+ 379
-----
```
- Units: 8 + 9 = 17 → write 7, carry 1
- Tens: 4 + 7 + 1 = 12 → write 2, carry 1
- Hundreds: 5 + 3 + 1 = 9
→
927
---
14. 775 + 98
```
775
+ 98
-----
```
- Units: 5 + 8 = 13 → write 3, carry 1
- Tens: 7 + 9 + 1 = 17 → write 7, carry 1
- Hundreds: 7 + 0 + 1 = 8
→
873
---
15. 792 + 488
```
792
+ 488
-----
```
- Units: 2 + 8 = 10 → write 0, carry 1
- Tens: 9 + 8 + 1 = 18 → write 8, carry 1
- Hundreds: 7 + 4 + 1 = 12
→
1280
---
16. 722 + 198
```
722
+ 198
-----
```
- Units: 2 + 8 = 10 → write 0, carry 1
- Tens: 2 + 9 + 1 = 12 → write 2, carry 1
- Hundreds: 7 + 1 + 1 = 9
→
920
---
✔ Final Answers:
| Problem | Answer |
|--------|--------|
| 1. 446 + 499 |
945 |
| 2. 578 + 349 |
927 |
| 3. 383 + 609 |
992 |
| 4. 525 + 79 |
604 |
| 5. 347 + 385 |
732 |
| 6. 108 + 794 |
902 |
| 7. 869 + 39 |
908 |
| 8. 686 + 338 |
1024 |
| 9. 589 + 483 |
1072 |
| 10. 760 + 159 |
919 |
| 11. 355 + 609 |
964 |
| 12. 276 + 589 |
865 |
| 13. 548 + 379 |
927 |
| 14. 775 + 98 |
873 |
| 15. 792 + 488 |
1280 |
| 16. 722 + 198 |
920 |
Let me know if you'd like a printable version or explanation for any specific problem!
Parent Tip: Review the logic above to help your child master the concept of three digit addition worksheet for grade 2.
