Math worksheet for practicing addition of two 4-digit numbers with regrouping.

Let's solve each of these addition problems step by step, adding two 4-digit numbers with regrouping (also known as carrying over). We'll go through each problem carefully.

---

1. 6127 + 2836

```
6127
+ 2836
------
```

Start from the right:

- Ones: 7 + 6 = 13 → write down 3, carry 1
- Tens: 2 + 3 = 5, plus carry 1 = 6
- Hundreds: 1 + 8 = 9
- Thousands: 6 + 2 = 8

✔ Answer: 8963

---

2. 3813 + 4048

```
3813
+ 4048
------
```

- Ones: 3 + 8 = 11 → write 1, carry 1
- Tens: 1 + 4 = 5, plus carry 1 = 6
- Hundreds: 8 + 0 = 8
- Thousands: 3 + 4 = 7

✔ Answer: 7861

---

3. 1013 + 4018

```
1013
+ 4018
------
```

- Ones: 3 + 8 = 11 → write 1, carry 1
- Tens: 1 + 1 = 2, plus carry 1 = 3
- Hundreds: 0 + 0 = 0
- Thousands: 1 + 4 = 5

✔ Answer: 5031

---

4. 5399 + 3588

```
5399
+ 3588
------
```

- Ones: 9 + 8 = 17 → write 7, carry 1
- Tens: 9 + 8 = 17, plus carry 1 = 18 → write 8, carry 1
- Hundreds: 3 + 5 = 8, plus carry 1 = 9
- Thousands: 5 + 3 = 8

✔ Answer: 8987

---

5. 7146 + 1198

```
7146
+ 1198
------
```

- Ones: 6 + 8 = 14 → write 4, carry 1
- Tens: 4 + 9 = 13, plus carry 1 = 14 → write 4, carry 1
- Hundreds: 1 + 1 = 2, plus carry 1 = 3
- Thousands: 7 + 1 = 8

✔ Answer: 8344

---

6. 5293 + 2537

```
5293
+ 2537
------
```

- Ones: 3 + 7 = 10 → write 0, carry 1
- Tens: 9 + 3 = 12, plus carry 1 = 13 → write 3, carry 1
- Hundreds: 2 + 5 = 7, plus carry 1 = 8
- Thousands: 5 + 2 = 7

✔ Answer: 7830

---

7. 1984 + 4648

```
1984
+ 4648
------
```

- Ones: 4 + 8 = 12 → write 2, carry 1
- Tens: 8 + 4 = 12, plus carry 1 = 13 → write 3, carry 1
- Hundreds: 9 + 6 = 15, plus carry 1 = 16 → write 6, carry 1
- Thousands: 1 + 4 = 5, plus carry 1 = 6

✔ Answer: 6632

---

8. 7788 + 1922

```
7788
+ 1922
------
```

- Ones: 8 + 2 = 10 → write 0, carry 1
- Tens: 8 + 2 = 10, plus carry 1 = 11 → write 1, carry 1
- Hundreds: 7 + 9 = 16, plus carry 1 = 17 → write 7, carry 1
- Thousands: 7 + 1 = 8, plus carry 1 = 9

✔ Answer: 9710

---

9. 3895 + 4949

```
3895
+ 4949
------
```

- Ones: 5 + 9 = 14 → write 4, carry 1
- Tens: 9 + 4 = 13, plus carry 1 = 14 → write 4, carry 1
- Hundreds: 8 + 9 = 17, plus carry 1 = 18 → write 8, carry 1
- Thousands: 3 + 4 = 7, plus carry 1 = 8

✔ Answer: 8844

---

10. 4467 + 3969

```
4467
+ 3969
------
```

- Ones: 7 + 9 = 16 → write 6, carry 1
- Tens: 6 + 6 = 12, plus carry 1 = 13 → write 3, carry 1
- Hundreds: 4 + 9 = 13, plus carry 1 = 14 → write 4, carry 1
- Thousands: 4 + 3 = 7, plus carry 1 = 8

✔ Answer: 8436

---

✔ Final Answers:

1. 6127 + 2836 = 8963
2. 3813 + 4048 = 7861
3. 1013 + 4018 = 5031
4. 5399 + 3588 = 8987
5. 7146 + 1198 = 8344
6. 5293 + 2537 = 7830
7. 1984 + 4648 = 6632
8. 7788 + 1922 = 9710
9. 3895 + 4949 = 8844
10. 4467 + 3969 = 8436

---

💡 Tips for Regrouping:
- Always start from the ones place.
- If the sum in any column is 10 or more, carry over the extra digit to the next column.
- Double-check your carries — they're easy to miss!

Let me know if you'd like a printable version or want to practice subtraction next! 😊