Let’s solve each problem step by step. We are adding or subtracting 4-digit and 2-digit numbers
without regrouping — that means we can add or subtract digit by digit from right to left, and no borrowing or carrying is needed.
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Problem 1: 5615 + 62
Start from the right:
- Ones place: 5 + 2 = 7
- Tens place: 1 + 6 = 7
- Hundreds place: 6 + 0 = 6 (since 62 has no hundreds)
- Thousands place: 5 + 0 = 5
→ Answer:
5677
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Problem 2: 3102 + 95
- Ones: 2 + 5 = 7
- Tens: 0 + 9 = 9
- Hundreds: 1 + 0 = 1
- Thousands: 3 + 0 = 3
→ Answer:
3197
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Problem 3: 5616 + 41
- Ones: 6 + 1 = 7
- Tens: 1 + 4 = 5
- Hundreds: 6 + 0 = 6
- Thousands: 5 + 0 = 5
→ Answer:
5657
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Problem 4: 8464 + 24
- Ones: 4 + 4 = 8
- Tens: 6 + 2 = 8
- Hundreds: 4 + 0 = 4
- Thousands: 8 + 0 = 8
→ Answer:
8488
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Problem 5: 1685 - 42
Subtract without regrouping:
- Ones: 5 - 2 = 3
- Tens: 8 - 4 = 4
- Hundreds: 6 - 0 = 6
- Thousands: 1 - 0 = 1
→ Answer:
1643
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Problem 6: 9078 - 73
- Ones: 8 - 3 = 5
- Tens: 7 - 7 = 0
- Hundreds: 0 - 0 = 0
- Thousands: 9 - 0 = 9
→ Answer:
9005
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Problem 7: 9458 - 38
- Ones: 8 - 8 = 0
- Tens: 5 - 3 = 2
- Hundreds: 4 - 0 = 4
- Thousands: 9 - 0 = 9
→ Answer:
9420
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Problem 8: 5289 - 75
- Ones: 9 - 5 = 4
- Tens: 8 - 7 = 1
- Hundreds: 2 - 0 = 2
- Thousands: 5 - 0 = 5
→ Answer:
5214
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Problem 9: 8067 - 21
- Ones: 7 - 1 = 6
- Tens: 6 - 2 = 4
- Hundreds: 0 - 0 = 0
- Thousands: 8 - 0 = 8
→ Answer:
8046
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Final Answer:
5677, 3197, 5657, 8488, 1643, 9005, 9420, 5214, 8046
Parent Tip: Review the logic above to help your child master the concept of math worksheets for 4th grade.
