4th Grade - Curriculum, Free Activities, Learning Resources - Free Printable

Let's solve each problem step by step. Since the instructions say "without regrouping," we can assume that in each case, the addition or subtraction does not require carrying (in addition) or borrowing (in subtraction) — meaning digits in each place value are added/subtracted directly without affecting other columns.

We'll go through each problem:

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1. 9413 + 66

Break it down:
- Units: 3 + 6 = 9
- Tens: 1 + 6 = 7
- Hundreds: 4 + 0 = 4
- Thousands: 9 + 0 = 9

So, 9413 + 66 = 9479

✔ No regrouping needed.

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2. 3814 + 51

- Units: 4 + 1 = 5
- Tens: 1 + 5 = 6
- Hundreds: 8 + 0 = 8
- Thousands: 3 + 0 = 3

So, 3814 + 51 = 3865

✔ No regrouping.

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3. 7735 + 14

- Units: 5 + 4 = 9
- Tens: 3 + 1 = 4
- Hundreds: 7 + 0 = 7
- Thousands: 7 + 0 = 7

So, 7735 + 14 = 7749

✔ No regrouping.

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4. 3642 + 41

- Units: 2 + 1 = 3
- Tens: 4 + 4 = 8
- Hundreds: 6 + 0 = 6
- Thousands: 3 + 0 = 3

So, 3642 + 41 = 3683

✔ No regrouping.

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5. 8804 + 91

- Units: 4 + 1 = 5
- Tens: 0 + 9 = 9
- Hundreds: 8 + 0 = 8
- Thousands: 8 + 0 = 8

So, 8804 + 91 = 8895

✔ No regrouping.

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6. 3699 - 81

- Units: 9 - 1 = 8
- Tens: 9 - 8 = 1
- Hundreds: 6 - 0 = 6
- Thousands: 3 - 0 = 3

So, 3699 - 81 = 3618

✔ No borrowing needed.

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7. 5896 - 90

- Units: 6 - 0 = 6
- Tens: 9 - 9 = 0
- Hundreds: 8 - 0 = 8
- Thousands: 5 - 0 = 5

So, 5896 - 90 = 5806

✔ No borrowing.

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8. 9578 - 15

- Units: 8 - 5 = 3
- Tens: 7 - 1 = 6
- Hundreds: 5 - 0 = 5
- Thousands: 9 - 0 = 9

So, 9578 - 15 = 9563

✔ No borrowing.

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9. 5989 - 55

- Units: 9 - 5 = 4
- Tens: 8 - 5 = 3
- Hundreds: 9 - 0 = 9
- Thousands: 5 - 0 = 5

So, 5989 - 55 = 5934

✔ No borrowing.

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10. 4978 - 77

- Units: 8 - 7 = 1
- Tens: 7 - 7 = 0
- Hundreds: 9 - 0 = 9
- Thousands: 4 - 0 = 4

So, 4978 - 77 = 4901

✔ No borrowing.

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✔ Final Answers:

1. 9413 + 66 = 9479
2. 3814 + 51 = 3865
3. 7735 + 14 = 7749
4. 3642 + 41 = 3683
5. 8804 + 91 = 8895
6. 3699 - 81 = 3618
7. 5896 - 90 = 5806
8. 9578 - 15 = 9563
9. 5989 - 55 = 5934
10. 4978 - 77 = 4901

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✔ All operations were done without regrouping, as required. Each digit was handled independently in its place value column.