Subtraction Across Zeros practice worksheet for students to calculate differences, featuring 25 problems with three-digit numbers.
Math worksheet titled "Team Practice #6: Subtraction Across Zeros (A)" with 25 subtraction problems involving three-digit numbers, including zeros, from Dream Team and LiveWorksheets.
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Step-by-step solution for: Subtraction Across Zeros WR 3 digits worksheet
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Show Answer Key & Explanations
Step-by-step solution for: Subtraction Across Zeros WR 3 digits worksheet
Sure! Let’s solve each subtraction problem step by step. The worksheet is titled “Subtraction Across Zeros (A)”, which means many of these problems involve borrowing across zeros — a common challenge in multi-digit subtraction.
I’ll go row by row and show the calculations clearly.
---
1. 602 – 371
```
602
- 371
-----
```
- Ones: 2 – 1 = 1
- Tens: 0 – 7 → Can’t do, borrow from hundreds.
Hundreds: 6 becomes 5, tens become 10.
Now 10 – 7 = 3
- Hundreds: 5 – 3 = 2
✔ Answer: 231
---
2. 705 – 212
```
705
- 212
-----
```
- Ones: 5 – 2 = 3
- Tens: 0 – 1 → Borrow from hundreds.
7 → 6, tens become 10 → 10 – 1 = 9
- Hundreds: 6 – 2 = 4
✔ Answer: 493
---
3. 900 – 882
```
900
- 882
-----
```
- Ones: 0 – 2 → Borrow. Tens are 0, so borrow from hundreds.
- Hundreds: 9 → 8
- Tens: 0 → 10, but we need to borrow for ones → tens become 9, ones become 10
- 10 – 2 = 8
- Tens: 9 – 8 = 1
- Hundreds: 8 – 8 = 0
✔ Answer: 18
---
4. 202 – 166
```
202
- 166
-----
```
- Ones: 2 – 6 → Borrow. Tens are 0 → borrow from hundreds.
- Hundreds: 2 → 1
- Tens: 0 → 10 → then lend 1 to ones → tens become 9, ones become 12
- 12 – 6 = 6
- Tens: 9 – 6 = 3
- Hundreds: 1 – 1 = 0
✔ Answer: 36
---
5. 306 – 219
```
306
- 219
-----
```
- Ones: 6 – 9 → Borrow. Tens are 0 → borrow from hundreds.
- Hundreds: 3 → 2
- Tens: 0 → 10 → lend 1 to ones → tens become 9, ones become 16
- 16 – 9 = 7
- Tens: 9 – 1 = 8
- Hundreds: 2 – 2 = 0
✔ Answer: 87
---
6. 404 – 348
```
404
- 348
-----
```
- Ones: 4 – 8 → Borrow. Tens are 0 → borrow from hundreds.
- Hundreds: 4 → 3
- Tens: 0 → 10 → lend 1 to ones → tens become 9, ones become 14
- 14 – 8 = 6
- Tens: 9 – 4 = 5
- Hundreds: 3 – 3 = 0
✔ Answer: 56
---
7. 907 – 566
```
907
- 566
-----
```
- Ones: 7 – 6 = 1
- Tens: 0 – 6 → Borrow. Hundreds: 9 → 8, tens become 10 → 10 – 6 = 4
- Hundreds: 8 – 5 = 3
✔ Answer: 341
---
8. 302 – 186
```
302
- 186
-----
```
- Ones: 2 – 6 → Borrow. Tens are 0 → borrow from hundreds.
- Hundreds: 3 → 2
- Tens: 0 → 10 → lend 1 to ones → tens become 9, ones become 12
- 12 – 6 = 6
- Tens: 9 – 8 = 1
- Hundreds: 2 – 1 = 1
✔ Answer: 116
---
9. 808 – 537
```
808
- 537
-----
```
- Ones: 8 – 7 = 1
- Tens: 0 – 3 → Borrow. Hundreds: 8 → 7, tens become 10 → 10 – 3 = 7
- Hundreds: 7 – 5 = 2
✔ Answer: 271
---
10. 403 – 123
```
403
- 123
-----
```
- Ones: 3 – 3 = 0
- Tens: 0 – 2 → Borrow. Hundreds: 4 → 3, tens become 10 → 10 – 2 = 8
- Hundreds: 3 – 1 = 2
✔ Answer: 280
---
11. 601 – 418
```
601
- 418
-----
```
- Ones: 1 – 8 → Borrow. Tens are 0 → borrow from hundreds.
- Hundreds: 6 → 5
- Tens: 0 → 10 → lend 1 to ones → tens become 9, ones become 11
- 11 – 8 = 3
- Tens: 9 – 1 = 8
- Hundreds: 5 – 4 = 1
✔ Answer: 183
---
12. 507 – 407
```
507
- 407
-----
```
- Ones: 7 – 7 = 0
- Tens: 0 – 0 = 0
- Hundreds: 5 – 4 = 1
✔ Answer: 100
---
13. 804 – 712
```
804
- 712
-----
```
- Ones: 4 – 2 = 2
- Tens: 0 – 1 → Borrow. Hundreds: 8 → 7, tens become 10 → 10 – 1 = 9
- Hundreds: 7 – 7 = 0
✔ Answer: 92
---
14. 208 – 127
```
208
- 127
-----
```
- Ones: 8 – 7 = 1
- Tens: 0 – 2 → Borrow. Hundreds: 2 → 1, tens become 10 → 10 – 2 = 8
- Hundreds: 1 – 1 = 0
✔ Answer: 81
---
15. 408 – 337
```
408
- 337
-----
```
- Ones: 8 – 7 = 1
- Tens: 0 – 3 → Borrow. Hundreds: 4 → 3, tens become 10 → 10 – 3 = 7
- Hundreds: 3 – 3 = 0
✔ Answer: 71
---
16. 507 – 463
```
507
- 463
-----
```
- Ones: 7 – 3 = 4
- Tens: 0 – 6 → Borrow. Hundreds: 5 → 4, tens become 10 → 10 – 6 = 4
- Hundreds: 4 – 4 = 0
✔ Answer: 44
---
17. 507 – 298
```
507
- 298
-----
```
- Ones: 7 – 8 → Borrow. Tens are 0 → borrow from hundreds.
- Hundreds: 5 → 4
- Tens: 0 → 10 → lend 1 to ones → tens become 9, ones become 17
- 17 – 8 = 9
- Tens: 9 – 9 = 0
- Hundreds: 4 – 2 = 2
✔ Answer: 209
---
18. 905 – 862
```
905
- 862
-----
```
- Ones: 5 – 2 = 3
- Tens: 0 – 6 → Borrow. Hundreds: 9 → 8, tens become 10 → 10 – 6 = 4
- Hundreds: 8 – 8 = 0
✔ Answer: 43
---
19. 405 – 124
```
405
- 124
-----
```
- Ones: 5 – 4 = 1
- Tens: 0 – 2 → Borrow. Hundreds: 4 → 3, tens become 10 → 10 – 2 = 8
- Hundreds: 3 – 1 = 2
✔ Answer: 281
---
20. 408 – 262
```
408
- 262
-----
```
- Ones: 8 – 2 = 6
- Tens: 0 – 6 → Borrow. Hundreds: 4 → 3, tens become 10 → 10 – 6 = 4
- Hundreds: 3 – 2 = 1
✔ Answer: 146
---
21. 907 – 658
```
907
- 658
-----
```
- Ones: 7 – 8 → Borrow. Tens are 0 → borrow from hundreds.
- Hundreds: 9 → 8
- Tens: 0 → 10 → lend 1 to ones → tens become 9, ones become 17
- 17 – 8 = 9
- Tens: 9 – 5 = 4
- Hundreds: 8 – 6 = 2
✔ Answer: 249
---
22. 207 – 123
```
207
- 123
-----
```
- Ones: 7 – 3 = 4
- Tens: 0 – 2 → Borrow. Hundreds: 2 → 1, tens become 10 → 10 – 2 = 8
- Hundreds: 1 – 1 = 0
✔ Answer: 84
---
23. 802 – 764
```
802
- 764
-----
```
- Ones: 2 – 4 → Borrow. Tens are 0 → borrow from hundreds.
- Hundreds: 8 → 7
- Tens: 0 → 10 → lend 1 to ones → tens become 9, ones become 12
- 12 – 4 = 8
- Tens: 9 – 6 = 3
- Hundreds: 7 – 7 = 0
✔ Answer: 38
---
24. 701 – 654
```
701
- 654
-----
```
- Ones: 1 – 4 → Borrow. Tens are 0 → borrow from hundreds.
- Hundreds: 7 → 6
- Tens: 0 → 10 → lend 1 to ones → tens become 9, ones become 11
- 11 – 4 = 7
- Tens: 9 – 5 = 4
- Hundreds: 6 – 6 = 0
✔ Answer: 47
---
25. 806 – 200
```
806
- 200
-----
```
- Ones: 6 – 0 = 6
- Tens: 0 – 0 = 0
- Hundreds: 8 – 2 = 6
✔ Answer: 606
---
## ✔ Final Answers (Row by Row):
Row 1:
231, 493, 18, 36, 87
Row 2:
56, 341, 116, 271, 280
Row 3:
183, 100, 92, 81, 71
Row 4:
44, 209, 43, 281, 146
Row 5:
249, 84, 38, 47, 606
---
Let me know if you’d like this formatted as a printable answer key or explained with visuals! 😊
I’ll go row by row and show the calculations clearly.
---
🔢 Row 1:
1. 602 – 371
```
602
- 371
-----
```
- Ones: 2 – 1 = 1
- Tens: 0 – 7 → Can’t do, borrow from hundreds.
Hundreds: 6 becomes 5, tens become 10.
Now 10 – 7 = 3
- Hundreds: 5 – 3 = 2
✔ Answer: 231
---
2. 705 – 212
```
705
- 212
-----
```
- Ones: 5 – 2 = 3
- Tens: 0 – 1 → Borrow from hundreds.
7 → 6, tens become 10 → 10 – 1 = 9
- Hundreds: 6 – 2 = 4
✔ Answer: 493
---
3. 900 – 882
```
900
- 882
-----
```
- Ones: 0 – 2 → Borrow. Tens are 0, so borrow from hundreds.
- Hundreds: 9 → 8
- Tens: 0 → 10, but we need to borrow for ones → tens become 9, ones become 10
- 10 – 2 = 8
- Tens: 9 – 8 = 1
- Hundreds: 8 – 8 = 0
✔ Answer: 18
---
4. 202 – 166
```
202
- 166
-----
```
- Ones: 2 – 6 → Borrow. Tens are 0 → borrow from hundreds.
- Hundreds: 2 → 1
- Tens: 0 → 10 → then lend 1 to ones → tens become 9, ones become 12
- 12 – 6 = 6
- Tens: 9 – 6 = 3
- Hundreds: 1 – 1 = 0
✔ Answer: 36
---
5. 306 – 219
```
306
- 219
-----
```
- Ones: 6 – 9 → Borrow. Tens are 0 → borrow from hundreds.
- Hundreds: 3 → 2
- Tens: 0 → 10 → lend 1 to ones → tens become 9, ones become 16
- 16 – 9 = 7
- Tens: 9 – 1 = 8
- Hundreds: 2 – 2 = 0
✔ Answer: 87
---
🔢 Row 2:
6. 404 – 348
```
404
- 348
-----
```
- Ones: 4 – 8 → Borrow. Tens are 0 → borrow from hundreds.
- Hundreds: 4 → 3
- Tens: 0 → 10 → lend 1 to ones → tens become 9, ones become 14
- 14 – 8 = 6
- Tens: 9 – 4 = 5
- Hundreds: 3 – 3 = 0
✔ Answer: 56
---
7. 907 – 566
```
907
- 566
-----
```
- Ones: 7 – 6 = 1
- Tens: 0 – 6 → Borrow. Hundreds: 9 → 8, tens become 10 → 10 – 6 = 4
- Hundreds: 8 – 5 = 3
✔ Answer: 341
---
8. 302 – 186
```
302
- 186
-----
```
- Ones: 2 – 6 → Borrow. Tens are 0 → borrow from hundreds.
- Hundreds: 3 → 2
- Tens: 0 → 10 → lend 1 to ones → tens become 9, ones become 12
- 12 – 6 = 6
- Tens: 9 – 8 = 1
- Hundreds: 2 – 1 = 1
✔ Answer: 116
---
9. 808 – 537
```
808
- 537
-----
```
- Ones: 8 – 7 = 1
- Tens: 0 – 3 → Borrow. Hundreds: 8 → 7, tens become 10 → 10 – 3 = 7
- Hundreds: 7 – 5 = 2
✔ Answer: 271
---
10. 403 – 123
```
403
- 123
-----
```
- Ones: 3 – 3 = 0
- Tens: 0 – 2 → Borrow. Hundreds: 4 → 3, tens become 10 → 10 – 2 = 8
- Hundreds: 3 – 1 = 2
✔ Answer: 280
---
🔢 Row 3:
11. 601 – 418
```
601
- 418
-----
```
- Ones: 1 – 8 → Borrow. Tens are 0 → borrow from hundreds.
- Hundreds: 6 → 5
- Tens: 0 → 10 → lend 1 to ones → tens become 9, ones become 11
- 11 – 8 = 3
- Tens: 9 – 1 = 8
- Hundreds: 5 – 4 = 1
✔ Answer: 183
---
12. 507 – 407
```
507
- 407
-----
```
- Ones: 7 – 7 = 0
- Tens: 0 – 0 = 0
- Hundreds: 5 – 4 = 1
✔ Answer: 100
---
13. 804 – 712
```
804
- 712
-----
```
- Ones: 4 – 2 = 2
- Tens: 0 – 1 → Borrow. Hundreds: 8 → 7, tens become 10 → 10 – 1 = 9
- Hundreds: 7 – 7 = 0
✔ Answer: 92
---
14. 208 – 127
```
208
- 127
-----
```
- Ones: 8 – 7 = 1
- Tens: 0 – 2 → Borrow. Hundreds: 2 → 1, tens become 10 → 10 – 2 = 8
- Hundreds: 1 – 1 = 0
✔ Answer: 81
---
15. 408 – 337
```
408
- 337
-----
```
- Ones: 8 – 7 = 1
- Tens: 0 – 3 → Borrow. Hundreds: 4 → 3, tens become 10 → 10 – 3 = 7
- Hundreds: 3 – 3 = 0
✔ Answer: 71
---
🔢 Row 4:
16. 507 – 463
```
507
- 463
-----
```
- Ones: 7 – 3 = 4
- Tens: 0 – 6 → Borrow. Hundreds: 5 → 4, tens become 10 → 10 – 6 = 4
- Hundreds: 4 – 4 = 0
✔ Answer: 44
---
17. 507 – 298
```
507
- 298
-----
```
- Ones: 7 – 8 → Borrow. Tens are 0 → borrow from hundreds.
- Hundreds: 5 → 4
- Tens: 0 → 10 → lend 1 to ones → tens become 9, ones become 17
- 17 – 8 = 9
- Tens: 9 – 9 = 0
- Hundreds: 4 – 2 = 2
✔ Answer: 209
---
18. 905 – 862
```
905
- 862
-----
```
- Ones: 5 – 2 = 3
- Tens: 0 – 6 → Borrow. Hundreds: 9 → 8, tens become 10 → 10 – 6 = 4
- Hundreds: 8 – 8 = 0
✔ Answer: 43
---
19. 405 – 124
```
405
- 124
-----
```
- Ones: 5 – 4 = 1
- Tens: 0 – 2 → Borrow. Hundreds: 4 → 3, tens become 10 → 10 – 2 = 8
- Hundreds: 3 – 1 = 2
✔ Answer: 281
---
20. 408 – 262
```
408
- 262
-----
```
- Ones: 8 – 2 = 6
- Tens: 0 – 6 → Borrow. Hundreds: 4 → 3, tens become 10 → 10 – 6 = 4
- Hundreds: 3 – 2 = 1
✔ Answer: 146
---
🔢 Row 5:
21. 907 – 658
```
907
- 658
-----
```
- Ones: 7 – 8 → Borrow. Tens are 0 → borrow from hundreds.
- Hundreds: 9 → 8
- Tens: 0 → 10 → lend 1 to ones → tens become 9, ones become 17
- 17 – 8 = 9
- Tens: 9 – 5 = 4
- Hundreds: 8 – 6 = 2
✔ Answer: 249
---
22. 207 – 123
```
207
- 123
-----
```
- Ones: 7 – 3 = 4
- Tens: 0 – 2 → Borrow. Hundreds: 2 → 1, tens become 10 → 10 – 2 = 8
- Hundreds: 1 – 1 = 0
✔ Answer: 84
---
23. 802 – 764
```
802
- 764
-----
```
- Ones: 2 – 4 → Borrow. Tens are 0 → borrow from hundreds.
- Hundreds: 8 → 7
- Tens: 0 → 10 → lend 1 to ones → tens become 9, ones become 12
- 12 – 4 = 8
- Tens: 9 – 6 = 3
- Hundreds: 7 – 7 = 0
✔ Answer: 38
---
24. 701 – 654
```
701
- 654
-----
```
- Ones: 1 – 4 → Borrow. Tens are 0 → borrow from hundreds.
- Hundreds: 7 → 6
- Tens: 0 → 10 → lend 1 to ones → tens become 9, ones become 11
- 11 – 4 = 7
- Tens: 9 – 5 = 4
- Hundreds: 6 – 6 = 0
✔ Answer: 47
---
25. 806 – 200
```
806
- 200
-----
```
- Ones: 6 – 0 = 6
- Tens: 0 – 0 = 0
- Hundreds: 8 – 2 = 6
✔ Answer: 606
---
## ✔ Final Answers (Row by Row):
Row 1:
231, 493, 18, 36, 87
Row 2:
56, 341, 116, 271, 280
Row 3:
183, 100, 92, 81, 71
Row 4:
44, 209, 43, 281, 146
Row 5:
249, 84, 38, 47, 606
---
Let me know if you’d like this formatted as a printable answer key or explained with visuals! 😊
Parent Tip: Review the logic above to help your child master the concept of subtraction regrouping with zeros worksheet.
