Let's solve each subtraction problem step by step using the standard algorithm (borrowing when needed). We'll go through each of the six problems one at a time.
---
Problem 1:
```
9 2 5
- 3 8 9
-------
```
Step-by-step:
1.
Ones place: 5 - 9 → Can't do, so borrow from tens.
- Tens digit (2) becomes 1, and ones become 15.
- 15 - 9 =
6
2.
Tens place: 1 (after borrowing) - 8 → Can't do, so borrow from hundreds.
- Hundreds digit (9) becomes 8, and tens become 11.
- 11 - 8 =
3
3.
Hundreds place: 8 - 3 =
5
✔ Answer: 536
---
Problem 2:
```
8 4 2
- 4 7 8
-------
```
1.
Ones place: 2 - 8 → Can't do, borrow from tens.
- Tens (4) → 3, ones become 12.
- 12 - 8 =
4
2.
Tens place: 3 - 7 → Can't do, borrow from hundreds.
- Hundreds (8) → 7, tens become 13.
- 13 - 7 =
6
3.
Hundreds place: 7 - 4 =
3
✔ Answer: 364
---
Problem 3:
```
5 2 3
- 2 9 7
-------
```
1.
Ones place: 3 - 7 → Borrow from tens.
- Tens (2) → 1, ones become 13.
- 13 - 7 =
6
2.
Tens place: 1 - 9 → Can't do, borrow from hundreds.
- Hundreds (5) → 4, tens become 11.
- 11 - 9 =
2
3.
Hundreds place: 4 - 2 =
2
✔ Answer: 226
---
Problem 4:
```
6 3 4
- 3 7 9
-------
```
1.
Ones place: 4 - 9 → Borrow from tens.
- Tens (3) → 2, ones become 14.
- 14 - 9 =
5
2.
Tens place: 2 - 7 → Can't do, borrow from hundreds.
- Hundreds (6) → 5, tens become 12.
- 12 - 7 =
5
3.
Hundreds place: 5 - 3 =
2
✔ Answer: 255
---
Problem 5:
```
8 3 2
- 5 5 6
-------
```
1.
Ones place: 2 - 6 → Borrow from tens.
- Tens (3) → 2, ones become 12.
- 12 - 6 =
6
2.
Tens place: 2 - 5 → Can't do, borrow from hundreds.
- Hundreds (8) → 7, tens become 12.
- 12 - 5 =
7
3.
Hundreds place: 7 - 5 =
2
✔ Answer: 276
---
Problem 6:
```
7 2 6
- 4 4 7
-------
```
1.
Ones place: 6 - 7 → Borrow from tens.
- Tens (2) → 1, ones become 16.
- 16 - 7 =
9
2.
Tens place: 1 - 4 → Can't do, borrow from hundreds.
- Hundreds (7) → 6, tens become 11.
- 11 - 4 =
7
3.
Hundreds place: 6 - 4 =
2
✔ Answer: 279
---
✔ Final Answers:
1. 925 - 389 =
536
2. 842 - 478 =
364
3. 523 - 297 =
226
4. 634 - 379 =
255
5. 832 - 556 =
276
6. 726 - 447 =
279
You can now fill in the blanks in the worksheet with these results.
Parent Tip: Review the logic above to help your child master the concept of subtraction regrouping worksheet grade 3.
