This worksheet provides structured practice for mastering three-digit subtraction with regrouping, perfect for classroom or homework use.

Let's solve each subtraction problem in the worksheet step by step, using three-digit subtraction with regrouping (also known as borrowing). The first one is already solved as an example:

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Example (Already Solved):

```
6 1 5
- 3 2 8
-------
3 4 7
```

We’ll now solve the remaining problems.

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1. 582 - 153

```
5 8 2
- 1 5 3
-------
```

Start from the right:
- Ones place: 2 - 3 → can't do, borrow from tens.
- Tens digit 8 becomes 7, ones become 12.
- 12 - 3 = 9
- Tens place: 7 - 5 = 2
- Hundreds place: 5 - 1 = 4

✔ Answer: 429

---

2. 867 - 508

```
8 6 7
- 5 0 8
-------
```

- Ones place: 7 - 8 → can't do, borrow from tens.
- Tens digit 6 becomes 5, ones become 17.
- 17 - 8 = 9
- Tens place: 5 - 0 = 5
- Hundreds place: 8 - 5 = 3

✔ Answer: 359

---

3. 580 - 321

```
5 8 0
- 3 2 1
-------
```

- Ones place: 0 - 1 → can't do, borrow from tens.
- Tens digit 8 becomes 7, ones become 10.
- 10 - 1 = 9
- Tens place: 7 - 2 = 5
- Hundreds place: 5 - 3 = 2

✔ Answer: 259

---

4. 777 - 168

```
7 7 7
- 1 6 8
-------
```

- Ones place: 7 - 8 → borrow from tens.
- Tens digit 7 becomes 6, ones become 17.
- 17 - 8 = 9
- Tens place: 6 - 6 = 0
- Hundreds place: 7 - 1 = 6

✔ Answer: 609

---

5. 672 - 223

```
6 7 2
- 2 2 3
-------
```

- Ones place: 2 - 3 → borrow from tens.
- Tens digit 7 becomes 6, ones become 12.
- 12 - 3 = 9
- Tens place: 6 - 2 = 4
- Hundreds place: 6 - 2 = 4

✔ Answer: 449

---

6. 490 - 177

```
4 9 0
- 1 7 7
-------
```

- Ones place: 0 - 7 → borrow from tens.
- Tens digit 9 becomes 8, ones become 10.
- 10 - 7 = 3
- Tens place: 8 - 7 = 1
- Hundreds place: 4 - 1 = 3

✔ Answer: 313

---

7. 866 - 337

```
8 6 6
- 3 3 7
-------
```

- Ones place: 6 - 7 → borrow from tens.
- Tens digit 6 becomes 5, ones become 16.
- 16 - 7 = 9
- Tens place: 5 - 3 = 2
- Hundreds place: 8 - 3 = 5

✔ Answer: 529

---

8. 666 - 307

```
6 6 6
- 3 0 7
-------
```

- Ones place: 6 - 7 → borrow from tens.
- Tens digit 6 becomes 5, ones become 16.
- 16 - 7 = 9
- Tens place: 5 - 0 = 5
- Hundreds place: 6 - 3 = 3

✔ Answer: 359

---

9. 464 - 215

```
4 6 4
- 2 1 5
-------
```

- Ones place: 4 - 5 → borrow from tens.
- Tens digit 6 becomes 5, ones become 14.
- 14 - 5 = 9
- Tens place: 5 - 1 = 4
- Hundreds place: 4 - 2 = 2

✔ Answer: 249

---

10. 933 - 626

```
9 3 3
- 6 2 6
-------
```

- Ones place: 3 - 6 → borrow from tens.
- Tens digit 3 becomes 2, ones become 13.
- 13 - 6 = 7
- Tens place: 2 - 2 = 0
- Hundreds place: 9 - 6 = 3

✔ Answer: 307

---

11. 691 - 422

```
6 9 1
- 4 2 2
-------
```

- Ones place: 1 - 2 → borrow from tens.
- Tens digit 9 becomes 8, ones become 11.
- 11 - 2 = 9
- Tens place: 8 - 2 = 6
- Hundreds place: 6 - 4 = 2

✔ Answer: 269

---

12. 580 - 108

```
5 8 0
- 1 0 8
-------
```

- Ones place: 0 - 8 → borrow from tens.
- Tens digit 8 becomes 7, ones become 10.
- 10 - 8 = 2
- Tens place: 7 - 0 = 7
- Hundreds place: 5 - 1 = 4

✔ Answer: 472

---

13. 252 - 247

```
2 5 2
- 2 4 7
-------
```

- Ones place: 2 - 7 → borrow from tens.
- Tens digit 5 becomes 4, ones become 12.
- 12 - 7 = 5
- Tens place: 4 - 4 = 0
- Hundreds place: 2 - 2 = 0

✔ Answer: 005 → 5

---

14. 612 - 104

```
6 1 2
- 1 0 4
-------
```

- Ones place: 2 - 4 → borrow from tens.
- Tens digit 1 becomes 0, ones become 12.
- 12 - 4 = 8
- Tens place: 0 - 0 = 0
- Hundreds place: 6 - 1 = 5

✔ Answer: 508

---

✔ Final Answers:

| Problem | Answer |
|--------|--------|
| 582 - 153 | 429 |
| 867 - 508 | 359 |
| 580 - 321 | 259 |
| 777 - 168 | 609 |
| 672 - 223 | 449 |
| 490 - 177 | 313 |
| 866 - 337 | 529 |
| 666 - 307 | 359 |
| 464 - 215 | 249 |
| 933 - 626 | 307 |
| 691 - 422 | 269 |
| 580 - 108 | 472 |
| 252 - 247 | 5 |
| 612 - 104 | 508 |

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