3 Digit Subtraction with Regrouping Worksheet

Sure! Let’s solve each of the 3-digit subtraction problems with regrouping one by one. I’ll show you the step-by-step process for each, including when and how to regroup (borrow).

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🔢 Problem 1:

834 – 665

```
834
– 665
------
```

- Ones place: 4 – 5 → Can’t do that, so borrow from tens.
- Tens digit is 3 → becomes 2, ones becomes 14.
- 14 – 5 = 9
- Tens place: 2 – 6 → Can’t do that, borrow from hundreds.
- Hundreds digit is 8 → becomes 7, tens becomes 12.
- 12 – 6 = 6
- Hundreds place: 7 – 6 = 1

✔ Answer: 169

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🔢 Problem 2:

352 – 169

```
352
– 169
------
```

- Ones place: 2 – 9 → Borrow from tens.
- Tens digit 5 → becomes 4, ones becomes 12.
- 12 – 9 = 3
- Tens place: 4 – 6 → Borrow from hundreds.
- Hundreds digit 3 → becomes 2, tens becomes 14.
- 14 – 6 = 8
- Hundreds place: 2 – 1 = 1

✔ Answer: 183

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🔢 Problem 3:

617 – 529

```
617
– 529
------
```

- Ones place: 7 – 9 → Borrow from tens.
- Tens digit 1 → becomes 0, ones becomes 17.
- 17 – 9 = 8
- Tens place: 0 – 2 → Borrow from hundreds.
- Hundreds digit 6 → becomes 5, tens becomes 10.
- 10 – 2 = 8
- Hundreds place: 5 – 5 = 0

✔ Answer: 88 (We don’t write leading zero)

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🔢 Problem 4:

427 – 238

```
427
– 238
------
```

- Ones place: 7 – 8 → Borrow from tens.
- Tens digit 2 → becomes 1, ones becomes 17.
- 17 – 8 = 9
- Tens place: 1 – 3 → Borrow from hundreds.
- Hundreds digit 4 → becomes 3, tens becomes 11.
- 11 – 3 = 8
- Hundreds place: 3 – 2 = 1

✔ Answer: 189

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🔢 Problem 5:

136 – 79

*(Note: This is a 3-digit minus 2-digit — treat 79 as 079)*

```
136
– 79
------
```

- Ones place: 6 – 9 → Borrow from tens.
- Tens digit 3 → becomes 2, ones becomes 16.
- 16 – 9 = 7
- Tens place: 2 – 7 → Borrow from hundreds.
- Hundreds digit 1 → becomes 0, tens becomes 12.
- 12 – 7 = 5
- Hundreds place: 0 – 0 = 0

✔ Answer: 57

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🔢 Problem 6:

788 – 499

```
788
– 499
------
```

- Ones place: 8 – 9 → Borrow from tens.
- Tens digit 8 → becomes 7, ones becomes 18.
- 18 – 9 = 9
- Tens place: 7 – 9 → Borrow from hundreds.
- Hundreds digit 7 → becomes 6, tens becomes 17.
- 17 – 9 = 8
- Hundreds place: 6 – 4 = 2

✔ Answer: 289

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🔢 Problem 7:

407 – 178

```
407
– 178
------
```

- Ones place: 7 – 8 → Borrow from tens.
- Tens digit is 0 → can’t borrow directly. Need to go to hundreds.
- Hundreds digit 4 → becomes 3, tens becomes 10.
- Now borrow from tens: tens becomes 9, ones becomes 17.
- 17 – 8 = 9
- Tens place: 9 – 7 = 2
- Hundreds place: 3 – 1 = 2

✔ Answer: 229

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🔢 Problem 8:

923 – 384

```
923
– 384
------
```

- Ones place: 3 – 4 → Borrow from tens.
- Tens digit 2 → becomes 1, ones becomes 13.
- 13 – 4 = 9
- Tens place: 1 – 8 → Borrow from hundreds.
- Hundreds digit 9 → becomes 8, tens becomes 11.
- 11 – 8 = 3
- Hundreds place: 8 – 3 = 5

✔ Answer: 539

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🔢 Problem 9:

305 – 169

```
305
– 169
------
```

- Ones place: 5 – 9 → Borrow from tens.
- Tens digit is 0 → borrow from hundreds.
- Hundreds digit 3 → becomes 2, tens becomes 10.
- Now borrow from tens: tens becomes 9, ones becomes 15.
- 15 – 9 = 6
- Tens place: 9 – 6 = 3
- Hundreds place: 2 – 1 = 1

✔ Answer: 136

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🔢 Problem 10:

268 – 79

*(Treat 79 as 079)*

```
268
– 79
------
```

- Ones place: 8 – 9 → Borrow from tens.
- Tens digit 6 → becomes 5, ones becomes 18.
- 18 – 9 = 9
- Tens place: 5 – 7 → Borrow from hundreds.
- Hundreds digit 2 → becomes 1, tens becomes 15.
- 15 – 7 = 8
- Hundreds place: 1 – 0 = 1

✔ Answer: 189

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## ✔ Final Answers (in order):

1. 169
2. 183
3. 88
4. 189
5. 57
6. 289
7. 229
8. 539
9. 136
10. 189

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Let me know if you’d like these written in the grid or need visual diagrams for regrouping! 😊