This worksheet provides 12 practice problems for mastering four-digit subtraction with regrouping.

Sure! Let’s solve each of the 12 subtraction problems with regrouping (also known as borrowing). I’ll walk through each one step by step, showing how to handle regrouping when needed.

---

Problem 1: 6355 – 3487

```
6355
- 3487
-------
```

Start from the rightmost digit:

- Ones place: 5 – 7 → can’t do, so borrow from tens.
- Tens digit is 5 → becomes 4, ones become 15.
- 15 – 7 = 8

- Tens place: 4 – 8 → can’t do, borrow from hundreds.
- Hundreds digit is 3 → becomes 2, tens become 14.
- 14 – 8 = 6

- Hundreds place: 2 – 4 → can’t do, borrow from thousands.
- Thousands digit is 6 → becomes 5, hundreds become 12.
- 12 – 4 = 8

- Thousands place: 5 – 3 = 2

✔ Answer: 2868

---

Problem 2: 7979 – 2086

```
7979
- 2086
-------
```

- Ones: 9 – 6 = 3
- Tens: 7 – 8 → borrow from hundreds.
- Hundreds is 9 → becomes 8, tens become 17.
- 17 – 8 = 9
- Hundreds: 8 – 0 = 8
- Thousands: 7 – 2 = 5

✔ Answer: 5893

---

Problem 3: 9092 – 888

> Note: 888 is a 3-digit number. We treat it as 0888 for alignment.

```
9092
- 0888
-------
```

- Ones: 2 – 8 → borrow.
- Tens is 9 → becomes 8, ones = 12 → 12 – 8 = 4
- Tens: 8 – 8 = 0
- Hundreds: 0 – 8 → can’t do. Borrow from thousands.
- Thousands is 9 → becomes 8, hundreds become 10.
- 10 – 8 = 2
- Thousands: 8 – 0 = 8

✔ Answer: 8204

---

Problem 4: 9156 – 6858

```
9156
- 6858
-------
```

- Ones: 6 – 8 → borrow → 16 – 8 = 8, tens becomes 4
- Tens: 4 – 5 → borrow → 14 – 5 = 9, hundreds becomes 0
- Hundreds: 0 – 8 → borrow → 10 – 8 = 2, thousands becomes 8
- Thousands: 8 – 6 = 2

✔ Answer: 2298

---

Problem 5: 5089 – 4883

```
5089
- 4883
-------
```

- Ones: 9 – 3 = 6
- Tens: 8 – 8 = 0
- Hundreds: 0 – 8 → borrow from thousands.
- Thousands: 5 → 4, hundreds = 10 → 10 – 8 = 2
- Thousands: 4 – 4 = 0

✔ Answer: 206

> (Note: Leading zero not written — so just 206)

---

Problem 6: 7726 – 1888

```
7726
- 1888
-------
```

- Ones: 6 – 8 → borrow → 16 – 8 = 8, tens becomes 1
- Tens: 1 – 8 → borrow → 11 – 8 = 3, hundreds becomes 6
- Hundreds: 6 – 8 → borrow → 16 – 8 = 8, thousands becomes 6
- Thousands: 6 – 1 = 5

✔ Answer: 5838

---

Problem 7: 5596 – 4955

```
5596
- 4955
-------
```

- Ones: 6 – 5 = 1
- Tens: 9 – 5 = 4
- Hundreds: 5 – 9 → borrow → 15 – 9 = 6, thousands becomes 4
- Thousands: 4 – 4 = 0

✔ Answer: 641

---

Problem 8: 3936 – 1284

```
3936
- 1284
-------
```

- Ones: 6 – 4 = 2
- Tens: 3 – 8 → borrow → 13 – 8 = 5, hundreds becomes 8
- Hundreds: 8 – 2 = 6
- Thousands: 3 – 1 = 2

✔ Answer: 2652

---

Problem 9: 8242 – 7768

```
8242
- 7768
-------
```

- Ones: 2 – 8 → borrow → 12 – 8 = 4, tens becomes 3
- Tens: 3 – 6 → borrow → 13 – 6 = 7, hundreds becomes 1
- Hundreds: 1 – 7 → borrow → 11 – 7 = 4, thousands becomes 7
- Thousands: 7 – 7 = 0

✔ Answer: 474

---

Problem 10: 7493 – 1558

```
7493
- 1558
-------
```

- Ones: 3 – 8 → borrow → 13 – 8 = 5, tens becomes 8
- Tens: 8 – 5 = 3
- Hundreds: 4 – 5 → borrow → 14 – 5 = 9, thousands becomes 6
- Thousands: 6 – 1 = 5

✔ Answer: 5935

---

Problem 11: 4526 – 1887

```
4526
- 1887
-------
```

- Ones: 6 – 7 → borrow → 16 – 7 = 9, tens becomes 1
- Tens: 1 – 8 → borrow → 11 – 8 = 3, hundreds becomes 4
- Hundreds: 4 – 8 → borrow → 14 – 8 = 6, thousands becomes 3
- Thousands: 3 – 1 = 2

✔ Answer: 2639

---

Problem 12: 3970 – 3772

```
3970
- 3772
-------
```

- Ones: 0 – 2 → borrow → 10 – 2 = 8, tens becomes 6
- Tens: 6 – 7 → borrow → 16 – 7 = 9, hundreds becomes 8
- Hundreds: 8 – 7 = 1
- Thousands: 3 – 3 = 0

✔ Answer: 198

---

## ✔ Final Answers:

1) 2868
2) 5893
3) 8204
4) 2298
5) 206
6) 5838
7) 641
8) 2652
9) 474
10) 5935
11) 2639
12) 198

---

Let me know if you’d like a visual column-by-column breakdown or printable answer sheet! 😊