Triple-digit subtraction practice problems on a math worksheet.

Let's solve each of the triple-digit subtraction problems step by step. We'll go through each one carefully, performing the subtraction and explaining any borrowing (regrouping) that is needed.

---

1. 837 - 421

```
837
- 421
-----
416
```
- 7 - 1 = 6
- 3 - 2 = 1
- 8 - 4 = 4
✔ Answer: 416

---

2. 367 - 118

```
367
- 118
-----
249
```
- 7 - 8 → can't do, borrow from 6 → becomes 17 - 8 = 9
- 5 (after borrowing) - 1 = 4
- 3 - 1 = 2
✔ Answer: 249

---

3. 820 - 592

```
820
- 592
-----
228
```
- 0 - 2 → can't do, borrow from 2 → becomes 10 - 2 = 8, but now 1 (from 2) becomes 1
- 1 - 9 → can't do, borrow from 8 → becomes 11 - 9 = 2
- 7 (after borrowing) - 5 = 2
✔ Answer: 228

---

4. 209 - 131

```
209
- 131
-----
78
```
- 9 - 1 = 8
- 0 - 3 → can't do, borrow from 2 → becomes 10 - 3 = 7
- 1 (after borrowing) - 1 = 0
✔ Answer: 78

---

5. 734 - 384

```
734
- 384
-----
350
```
- 4 - 4 = 0
- 3 - 8 → can't do, borrow from 7 → becomes 13 - 8 = 5
- 6 (after borrowing) - 3 = 3
✔ Answer: 350

---

6. 612 - 444

```
612
- 444
-----
168
```
- 2 - 4 → can't do, borrow from 1 → becomes 12 - 4 = 8
- 0 (after borrowing) - 4 → can't do, borrow from 6 → becomes 10 - 4 = 6
- 5 (after borrowing) - 4 = 1
✔ Answer: 168

---

7. 900 - 156

```
900
- 156
-----
744
```
- 0 - 6 → can't do, borrow from 0 → need to go to 9
- Borrow 1 from 9 → makes it 8, then 10 in tens place
- But tens digit is 0, so we borrow from 9 → make it 8, then tens become 10
- Now borrow 1 from tens → tens become 9, units become 10
- 10 - 6 = 4
- 9 - 5 = 4
- 8 - 1 = 7
✔ Answer: 744

---

8. 801 - 511

```
801
- 511
-----
290
```
- 1 - 1 = 0
- 0 - 1 → can't do, borrow from 8 → becomes 10 - 1 = 9
- 7 (after borrowing) - 5 = 2
✔ Answer: 290

---

9. 338 - 167

```
338
- 167
-----
171
```
- 8 - 7 = 1
- 3 - 6 → can't do, borrow from 3 → becomes 13 - 6 = 7
- 2 (after borrowing) - 1 = 1
✔ Answer: 171

---

10. 770 - 402

```
770
- 402
-----
368
```
- 0 - 2 → can't do, borrow from 7 → becomes 10 - 2 = 8
- 6 (after borrowing) - 0 = 6
- 7 - 4 = 3
✔ Answer: 368

---

11. 652 - 228

```
652
- 228
-----
424
```
- 2 - 8 → can't do, borrow from 5 → becomes 12 - 8 = 4
- 4 (after borrowing) - 2 = 2
- 6 - 2 = 4
✔ Answer: 424

---

12. 529 - 102

```
529
- 102
-----
427
```
- 9 - 2 = 7
- 2 - 0 = 2
- 5 - 1 = 4
✔ Answer: 427

---

13. 946 - 755

```
946
- 755
-----
191
```
- 6 - 5 = 1
- 4 - 5 → can't do, borrow from 9 → becomes 14 - 5 = 9
- 8 (after borrowing) - 7 = 1
✔ Answer: 191

---

14. 886 - 609

```
886
- 609
-----
277
```
- 6 - 9 → can't do, borrow from 8 → becomes 16 - 9 = 7
- 7 (after borrowing) - 0 = 7
- 8 - 6 = 2
✔ Answer: 277

---

15. 652 - 564

```
652
- 564
-----
88
```
- 2 - 4 → can't do, borrow from 5 → becomes 12 - 4 = 8
- 4 (after borrowing) - 6 → can't do, borrow from 6 → becomes 14 - 6 = 8
- 5 (after borrowing) - 5 = 0
✔ Answer: 88

---

16. 499 - 115

```
499
- 115
-----
384
```
- 9 - 5 = 4
- 9 - 1 = 8
- 4 - 1 = 3
✔ Answer: 384

---

✔ Final Answers:

| Problem | Answer |
|--------|--------|
| 837 - 421 | 416 |
| 367 - 118 | 249 |
| 820 - 592 | 228 |
| 209 - 131 | 78 |
| 734 - 384 | 350 |
| 612 - 444 | 168 |
| 900 - 156 | 744 |
| 801 - 511 | 290 |
| 338 - 167 | 171 |
| 770 - 402 | 368 |
| 652 - 228 | 424 |
| 529 - 102 | 427 |
| 946 - 755 | 191 |
| 886 - 609 | 277 |
| 652 - 564 | 88 |
| 499 - 115 | 384 |

Let me know if you'd like this formatted as a printable worksheet or with step-by-step visual explanations!