I will solve each subtraction problem step by step, checking my work carefully.
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Problem 1: 98 - 39
Start from the right:
- 8 - 9 → can’t do, borrow from 9 → 18 - 9 = 9
- Now 8 (after borrowing) - 3 = 5
→ Answer:
59
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Problem 2: 96 - 54
- 6 - 4 = 2
- 9 - 5 = 4
→ Answer:
42
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Problem 3: 82 - 49
- 2 - 9 → borrow → 12 - 9 = 3
- 7 (after borrow) - 4 = 3
→ Answer:
33
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Problem 4: 75 - 46
- 5 - 6 → borrow → 15 - 6 = 9
- 6 (after borrow) - 4 = 2
→ Answer:
29
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Problem 5: 95 - 72
- 5 - 2 = 3
- 9 - 7 = 2
→ Answer:
23
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Problem 6: 64 - 55
- 4 - 5 → borrow → 14 - 5 = 9
- 5 (after borrow) - 5 = 0
→ Answer:
9
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Problem 7: 59 - 42
- 9 - 2 = 7
- 5 - 4 = 1
→ Answer:
17
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Problem 8: 67 - 59
- 7 - 9 → borrow → 17 - 9 = 8
- 5 (after borrow) - 5 = 0
→ Answer:
8
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Problem 9: 82 - 28
- 2 - 8 → borrow → 12 - 8 = 4
- 7 (after borrow) - 2 = 5
→ Answer:
54
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Problem 10: 94 - 67
- 4 - 7 → borrow → 14 - 7 = 7
- 8 (after borrow) - 6 = 2
→ Answer:
27
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Problem 11: 48 - 32
- 8 - 2 = 6
- 4 - 3 = 1
→ Answer:
16
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Problem 12: 87 - 58
- 7 - 8 → borrow → 17 - 8 = 9
- 7 (after borrow) - 5 = 2
→ Answer:
29
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Problem 13: 194 - 145
- 4 - 5 → borrow → 14 - 5 = 9
- 8 (after borrow) - 4 = 4
- 1 - 1 = 0
→ Answer:
49
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Problem 14: 816 - 527
- 6 - 7 → borrow → 16 - 7 = 9
- 0 (after borrow) - 2 → need to borrow again → 10 - 2 = 8
- 7 (after borrow) - 5 = 2
→ Answer:
289
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Problem 15: 927 - 349
- 7 - 9 → borrow → 17 - 9 = 8
- 1 (after borrow) - 4 → borrow → 11 - 4 = 7
- 8 (after borrow) - 3 = 5
→ Answer:
578
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Problem 16: 745 - 577
- 5 - 7 → borrow → 15 - 7 = 8
- 3 (after borrow) - 7 → borrow → 13 - 7 = 6
- 6 (after borrow) - 5 = 1
→ Answer:
168
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Problem 17: 822 - 457
- 2 - 7 → borrow → 12 - 7 = 5
- 1 (after borrow) - 5 → borrow → 11 - 5 = 6
- 7 (after borrow) - 4 = 3
→ Answer:
365
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Problem 18: 216 - 148
- 6 - 8 → borrow → 16 - 8 = 8
- 0 (after borrow) - 4 → borrow → 10 - 4 = 6
- 1 (after borrow) - 1 = 0
→ Answer:
68
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Problem 19: 225 - 166
- 5 - 6 → borrow → 15 - 6 = 9
- 1 (after borrow) - 6 → borrow → 11 - 6 = 5
- 1 (after borrow) - 1 = 0
→ Answer:
59
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Problem 20: 214 - 129
- 4 - 9 → borrow → 14 - 9 = 5
- 0 (after borrow) - 2 → borrow → 10 - 2 = 8
- 1 (after borrow) - 1 = 0
→ Answer:
85
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Final Answer:
1. 59
2. 42
3. 33
4. 29
5. 23
6. 9
7. 17
8. 8
9. 54
10. 27
11. 16
12. 29
13. 49
14. 289
15. 578
16. 168
17. 365
18. 68
19. 59
20. 85
Parent Tip: Review the logic above to help your child master the concept of year 4 maths worksheet.