Let's solve each of the addition and subtraction problems on the worksheet
without regrouping. That means we will only perform operations where the digits in each column (ones, tens, hundreds, thousands) do not exceed 9 when adding or go below 0 when subtracting.
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🔢 Problem 1:
5615 + 62
Break it down by place value:
- Ones: 5 + 2 = 7
- Tens: 1 + 6 = 7
- Hundreds: 6 + 0 = 6
- Thousands: 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
- 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 Answers:
| Problem | Answer |
|--------|--------|
| 5615 + 62 |
5677 |
| 3102 + 95 |
3197 |
| 5616 + 41 |
5657 |
| 8464 + 24 |
8488 |
| 1685 - 42 |
1643 |
| 9078 - 73 |
9005 |
| 9458 - 38 |
9420 |
| 5289 - 75 |
5214 |
| 8067 - 21 |
8046 |
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📝 Explanation:
We added or subtracted digit by digit from right to left (ones → tens → hundreds → thousands), making sure that no column required borrowing (in subtraction) or carrying over (in addition). Since all operations were done
without regrouping, the process was straightforward.
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 algebra worksheet 4th grade.
