Subtraction practice worksheet for four-digit numbers with regrouping.

Let's solve each of the four-digit subtraction problems with regrouping (also known as borrowing). I'll go step by step through each problem, showing how to subtract and handle cases where you need to borrow from higher place values.

---

1. 8492 - 6786

```
8492
- 6786
------
```

Start from the right:
- Ones: 2 - 6 → can't do, borrow from tens. Tens digit is 9 → becomes 8, ones become 12.
- 12 - 6 = 6
- Tens: 8 - 8 = 0
- Hundreds: 4 - 7 → can't do, borrow from thousands. Thousands digit 8 → becomes 7, hundreds become 14.
- 14 - 7 = 7
- Thousands: 7 - 6 = 1

✔ Answer: 1706

---

2. 8523 - 7639

```
8523
- 7639
------
```

- Ones: 3 - 9 → borrow. Tens: 2 → 1, ones: 13 - 9 = 4
- Tens: 1 - 3 → borrow. Hundreds: 5 → 4, tens: 11 - 3 = 8
- Hundreds: 4 - 6 → borrow. Thousands: 8 → 7, hundreds: 14 - 6 = 8
- Thousands: 7 - 7 = 0

✔ Answer: 884

---

3. 2345 - 1480

```
2345
- 1480
------
```

- Ones: 5 - 0 = 5
- Tens: 4 - 8 → borrow. Hundreds: 3 → 2, tens: 14 - 8 = 6
- Hundreds: 2 - 4 → borrow. Thousands: 2 → 1, hundreds: 12 - 4 = 8
- Thousands: 1 - 1 = 0

✔ Answer: 865

---

4. 2985 - 2976

```
2985
- 2976
------
```

- Ones: 5 - 6 → borrow. Tens: 8 → 7, ones: 15 - 6 = 9
- Tens: 7 - 7 = 0
- Hundreds: 9 - 9 = 0
- Thousands: 2 - 2 = 0

✔ Answer: 9

---

5. 4372 - 684

Note: This is a three-digit subtrahend. Align right:

```
4372
- 684
------
```

- Ones: 2 - 4 → borrow. Tens: 7 → 6, ones: 12 - 4 = 8
- Tens: 6 - 8 → borrow. Hundreds: 3 → 2, tens: 16 - 8 = 8
- Hundreds: 2 - 6 → borrow. Thousands: 4 → 3, hundreds: 12 - 6 = 6
- Thousands: 3 - 0 = 3

✔ Answer: 3688

---

6. 4279 - 2783

```
4279
- 2783
------
```

- Ones: 9 - 3 = 6
- Tens: 7 - 8 → borrow. Hundreds: 2 → 1, tens: 17 - 8 = 9
- Hundreds: 1 - 7 → borrow. Thousands: 4 → 3, hundreds: 11 - 7 = 4
- Thousands: 3 - 2 = 1

✔ Answer: 1496

---

7. 3423 - 1738

```
3423
- 1738
------
```

- Ones: 3 - 8 → borrow. Tens: 2 → 1, ones: 13 - 8 = 5
- Tens: 1 - 3 → borrow. Hundreds: 4 → 3, tens: 11 - 3 = 8
- Hundreds: 3 - 7 → borrow. Thousands: 3 → 2, hundreds: 13 - 7 = 6
- Thousands: 2 - 1 = 1

✔ Answer: 1685

---

8. 2824 - 1755

```
2824
- 1755
------
```

- Ones: 4 - 5 → borrow. Tens: 2 → 1, ones: 14 - 5 = 9
- Tens: 1 - 5 → borrow. Hundreds: 8 → 7, tens: 11 - 5 = 6
- Hundreds: 7 - 7 = 0
- Thousands: 2 - 1 = 1

✔ Answer: 1069

---

9. 9833 - 7925

```
9833
- 7925
------
```

- Ones: 3 - 5 → borrow. Tens: 3 → 2, ones: 13 - 5 = 8
- Tens: 2 - 2 = 0
- Hundreds: 8 - 9 → borrow. Thousands: 9 → 8, hundreds: 18 - 9 = 9
- Thousands: 8 - 7 = 1

✔ Answer: 1908

---

10. 8530 - 829

Align:

```
8530
- 829
------
```

- Ones: 0 - 9 → borrow. Tens: 3 → 2, ones: 10 - 9 = 1
- Tens: 2 - 2 = 0
- Hundreds: 5 - 8 → borrow. Thousands: 8 → 7, hundreds: 15 - 8 = 7
- Thousands: 7 - 0 = 7

✔ Answer: 7701

---

11. 5821 - 1943

```
5821
- 1943
------
```

- Ones: 1 - 3 → borrow. Tens: 2 → 1, ones: 11 - 3 = 8
- Tens: 1 - 4 → borrow. Hundreds: 8 → 7, tens: 11 - 4 = 7
- Hundreds: 7 - 9 → borrow. Thousands: 5 → 4, hundreds: 17 - 9 = 8
- Thousands: 4 - 1 = 3

✔ Answer: 3878

---

12. 5749 - 2851

```
5749
- 2851
------
```

- Ones: 9 - 1 = 8
- Tens: 4 - 5 → borrow. Hundreds: 7 → 6, tens: 14 - 5 = 9
- Hundreds: 6 - 8 → borrow. Thousands: 5 → 4, hundreds: 16 - 8 = 8
- Thousands: 4 - 2 = 2

✔ Answer: 2898

---

13. 8659 - 6739

```
8659
- 6739
------
```

- Ones: 9 - 9 = 0
- Tens: 5 - 3 = 2
- Hundreds: 6 - 7 → borrow. Thousands: 8 → 7, hundreds: 16 - 7 = 9
- Thousands: 7 - 6 = 1

✔ Answer: 1920

---

14. 5433 - 3844

```
5433
- 3844
------
```

- Ones: 3 - 4 → borrow. Tens: 3 → 2, ones: 13 - 4 = 9
- Tens: 2 - 4 → borrow. Hundreds: 4 → 3, tens: 12 - 4 = 8
- Hundreds: 3 - 8 → borrow. Thousands: 5 → 4, hundreds: 13 - 8 = 5
- Thousands: 4 - 3 = 1

✔ Answer: 1589

---

15. 1099 - 435

```
1099
- 435
------
```

- Ones: 9 - 5 = 4
- Tens: 9 - 3 = 6
- Hundreds: 0 - 4 → borrow. Thousands: 1 → 0, hundreds: 10 - 4 = 6
- Thousands: 0 - 0 = 0

✔ Answer: 664

---

16. 3295 - 1096

```
3295
- 1096
------
```

- Ones: 5 - 6 → borrow. Tens: 9 → 8, ones: 15 - 6 = 9
- Tens: 8 - 9 → borrow. Hundreds: 2 → 1, tens: 18 - 9 = 9
- Hundreds: 1 - 0 = 1
- Thousands: 3 - 1 = 2

✔ Answer: 2199

---

17. 2205 - 1083

```
2205
- 1083
------
```

- Ones: 5 - 3 = 2
- Tens: 0 - 8 → borrow. Hundreds: 2 → 1, tens: 10 - 8 = 2
- Hundreds: 1 - 0 = 1
- Thousands: 2 - 1 = 1

✔ Answer: 1122

---

18. 4034 - 3856

```
4034
- 3856
------
```

- Ones: 4 - 6 → borrow. Tens: 3 → 2, ones: 14 - 6 = 8
- Tens: 2 - 5 → borrow. Hundreds: 0 → 9 (but needs borrow), so go to thousands.
- Thousands: 4 → 3, hundreds: 10 → but we need to borrow for tens.
- So hundreds: 0 → 9 (after borrow), then tens: 12 - 5 = 7
- Hundreds: 9 - 8 = 1
- Thousands: 3 - 3 = 0

Wait — let's do it carefully:

Actually:
- Ones: 4 - 6 → borrow → 14 - 6 = 8, tens becomes 2
- Tens: 2 - 5 → can’t → borrow from hundreds. But hundreds is 0 → so borrow from thousands.
- Thousands: 4 → 3, hundreds: 0 → 10, now borrow: hundreds: 10 → 9, tens: 12 - 5 = 7
- Hundreds: 9 - 8 = 1
- Thousands: 3 - 3 = 0

✔ Answer: 178

---

19. 7582 - 4893

```
7582
- 4893
------
```

- Ones: 2 - 3 → borrow. Tens: 8 → 7, ones: 12 - 3 = 9
- Tens: 7 - 9 → borrow. Hundreds: 5 → 4, tens: 17 - 9 = 8
- Hundreds: 4 - 8 → borrow. Thousands: 7 → 6, hundreds: 14 - 8 = 6
- Thousands: 6 - 4 = 2

✔ Answer: 2689

---

20. 4557 - 839

Align:

```
4557
- 839
------
```

- Ones: 7 - 9 → borrow. Tens: 5 → 4, ones: 17 - 9 = 8
- Tens: 4 - 3 = 1
- Hundreds: 5 - 8 → borrow. Thousands: 4 → 3, hundreds: 15 - 8 = 7
- Thousands: 3 - 0 = 3

✔ Answer: 3718

---

## ✔ Final Answers:

| Problem | Answer |
|--------|--------|
| 1. | 1706 |
| 2. | 884 |
| 3. | 865 |
| 4. | 9 |
| 5. | 3688 |
| 6. | 1496 |
| 7. | 1685 |
| 8. | 1069 |
| 9. | 1908 |
| 10. | 7701 |
| 11. | 3878 |
| 12. | 2898 |
| 13. | 1920 |
| 14. | 1589 |
| 15. | 664 |
| 16. | 2199 |
| 17. | 1122 |
| 18. | 178 |
| 19. | 2689 |
| 20. | 3718 |

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