Math worksheet for practicing addition with carrying for 3-digit numbers.

Let's solve each of the addition problems with carrying (also known as regrouping) for 3-digit numbers. We'll go step by step, adding from right to left (ones, tens, hundreds), and carry over when necessary.

---

1. 372 + 356

```
372
+ 356
-----
```

- Ones place: 2 + 6 = 8 → write down 8
- Tens place: 7 + 5 = 12 → write down 2, carry over 1
- Hundreds place: 3 + 3 + 1 (carry) = 7

✔ Answer: 728

---

2. 423 + 328

```
423
+ 328
-----
```

- Ones: 3 + 8 = 11 → write 1, carry 1
- Tens: 2 + 2 + 1 = 5
- Hundreds: 4 + 3 = 7

✔ Answer: 751

---

3. 736 + 187

```
736
+ 187
-----
```

- Ones: 6 + 7 = 13 → write 3, carry 1
- Tens: 3 + 8 + 1 = 12 → write 2, carry 1
- Hundreds: 7 + 1 + 1 = 9

✔ Answer: 923

---

4. 638 + 204

```
638
+ 204
-----
```

- Ones: 8 + 4 = 12 → write 2, carry 1
- Tens: 3 + 0 + 1 = 4
- Hundreds: 6 + 2 = 8

✔ Answer: 842

---

5. 783 + 794

```
783
+ 794
-----
```

- Ones: 3 + 4 = 7
- Tens: 8 + 9 = 17 → write 7, carry 1
- Hundreds: 7 + 7 + 1 = 15

✔ Answer: 1577

---

6. 209 + 465

```
209
+ 465
-----
```

- Ones: 9 + 5 = 14 → write 4, carry 1
- Tens: 0 + 6 + 1 = 7
- Hundreds: 2 + 4 = 6

✔ Answer: 674

---

7. 603 + 306

```
603
+ 306
-----
```

- Ones: 3 + 6 = 9
- Tens: 0 + 0 = 0
- Hundreds: 6 + 3 = 9

✔ Answer: 909

---

8. 382 + 468

```
382
+ 468
-----
```

- Ones: 2 + 8 = 10 → write 0, carry 1
- Tens: 8 + 6 + 1 = 15 → write 5, carry 1
- Hundreds: 3 + 4 + 1 = 8

✔ Answer: 850

---

9. 475 + 250

```
475
+ 250
-----
```

- Ones: 5 + 0 = 5
- Tens: 7 + 5 = 12 → write 2, carry 1
- Hundreds: 4 + 2 + 1 = 7

✔ Answer: 725

---

10. 355 + 505

```
355
+ 505
-----
```

- Ones: 5 + 5 = 10 → write 0, carry 1
- Tens: 5 + 0 + 1 = 6
- Hundreds: 3 + 5 = 8

✔ Answer: 860

---

✔ Final Answers:

1. 372 + 356 = 728
2. 423 + 328 = 751
3. 736 + 187 = 923
4. 638 + 204 = 842
5. 783 + 794 = 1577
6. 209 + 465 = 674
7. 603 + 306 = 909
8. 382 + 468 = 850
9. 475 + 250 = 725
10. 355 + 505 = 860

---

Let me know if you'd like a printable version or explanation in another format! 🚗🦆