Let's solve each of the
column subtraction problems step by step. We'll subtract the bottom number from the top number in each case.
---
1. 80 - 36
```
80
- 36
----
44
```
Explanation:
- 0 - 6 → can't do, borrow 1 from 8 → 10 - 6 = 4
- 7 (after borrowing) - 3 = 4
✔ Answer: 44
---
2. 76 - 40
```
76
- 40
----
36
```
Explanation:
- 6 - 0 = 6
- 7 - 4 = 3
✔ Answer: 36
---
3. 61 - 43
```
61
- 43
----
18
```
Explanation:
- 1 - 3 → can't do, borrow 1 from 6 → 11 - 3 = 8
- 5 (after borrowing) - 4 = 1
✔ Answer: 18
---
4. 87 - 30
```
87
- 30
----
57
```
Explanation:
- 7 - 0 = 7
- 8 - 3 = 5
✔ Answer: 57
---
5. 95 - 32
```
95
- 32
----
63
```
Explanation:
- 5 - 2 = 3
- 9 - 3 = 6
✔ Answer: 63
---
6. 41 - 20
```
41
- 20
----
21
```
Explanation:
- 1 - 0 = 1
- 4 - 2 = 2
✔ Answer: 21
---
7. 89 - 60
```
89
- 60
----
29
```
Explanation:
- 9 - 0 = 9
- 8 - 6 = 2
✔ Answer: 29
---
8. 49 - 15
```
49
- 15
----
34
```
Explanation:
- 9 - 5 = 4
- 4 - 1 = 3
✔ Answer: 34
---
9. 369 - 215
```
369
- 215
-----
154
```
Explanation:
- 9 - 5 = 4
- 6 - 1 = 5
- 3 - 2 = 1
✔ Answer: 154
---
10. 260 - 170
```
260
- 170
-----
090 → 90
```
Explanation:
- 0 - 0 = 0
- 6 - 7 → can't do, borrow from 2 → 16 - 7 = 9
- 1 (after borrowing) - 1 = 0
So, 090 =
90
✔ Answer: 90
---
11. 680 - 340
```
680
- 340
-----
340
```
Explanation:
- 0 - 0 = 0
- 8 - 4 = 4
- 6 - 3 = 3
✔ Answer: 340
---
12. 510 - 230
```
510
- 230
-----
280
```
Explanation:
- 0 - 0 = 0
- 1 - 3 → can't do, borrow from 5 → 11 - 3 = 8
- 4 (after borrowing) - 2 = 2
✔ Answer: 280
---
✔ Final Answers:
1.
44
2.
36
3.
18
4.
57
5.
63
6.
21
7.
29
8.
34
9.
154
10.
90
11.
340
12.
280
Let me know if you'd like this formatted as a printable answer key!
Parent Tip: Review the logic above to help your child master the concept of mathematics 3rd grade worksheet.
