Rounding to the nearest hundred worksheet with a rhyming guide and numbered exercises.

Let's solve this rounding worksheet step by step using the rounding rhyme provided:

> **"Underline the digit,
> Look next door,
> If it’s 5 or higher,
> Add 1 more.
> If it’s 4 or lower,
> Just ignore."**

We are rounding each number to the nearest hundred.

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🔁 How to Round to the Nearest Hundred:

1. Identify the hundreds digit (the third digit from the right).
2. Look at the tens digit (the one "next door").
3. If the tens digit is 5 or higher, round up (add 1 to the hundreds digit).
4. If the tens digit is 4 or lower, keep the hundreds digit the same.
5. Replace the tens and ones digits with 00.

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Now let's go through each number:

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#### 1. 570
- Hundreds digit: 5
- Tens digit: 7 → 7 ≥ 5, so round up
- 5 + 1 = 6 → 600

✔ 600

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#### 2. 126
- Hundreds digit: 1
- Tens digit: 2 → 2 ≤ 4, so keep it
- → 100

✔ 100

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#### 3. 446
- Hundreds digit: 4
- Tens digit: 4 → 4 ≤ 4, so keep it
- → 400

✔ 400

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#### 4. 290
- Hundreds digit: 2
- Tens digit: 9 → 9 ≥ 5, so round up
- 2 + 1 = 3 → 300

✔ 300

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#### 5. 233
- Hundreds digit: 2
- Tens digit: 3 → 3 ≤ 4, so keep it
- → 200

✔ 200

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#### 6. 377
- Hundreds digit: 3
- Tens digit: 7 → 7 ≥ 5, so round up
- 3 + 1 = 4 → 400

✔ 400

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#### 7. 199
- Hundreds digit: 1
- Tens digit: 9 → 9 ≥ 5, so round up
- 1 + 1 = 2 → 200

✔ 200

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#### 8. 677
- Hundreds digit: 6
- Tens digit: 7 → 7 ≥ 5, so round up
- 6 + 1 = 7 → 700

✔ 700

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#### 9. 818
- Hundreds digit: 8
- Tens digit: 1 → 1 ≤ 4, so keep it
- → 800

✔ 800

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#### 10. 409
- Hundreds digit: 4
- Tens digit: 0 → 0 ≤ 4, so keep it
- → 400

✔ 400

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#### 11. 899
- Hundreds digit: 8
- Tens digit: 9 → 9 ≥ 5, so round up
- 8 + 1 = 9 → 900

✔ 900

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#### 12. 564
- Hundreds digit: 5
- Tens digit: 6 → 6 ≥ 5, so round up
- 5 + 1 = 6 → 600

✔ 600

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#### 13. 327
- Hundreds digit: 3
- Tens digit: 2 → 2 ≤ 4, so keep it
- → 300

✔ 300

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#### 14. 352
- Hundreds digit: 3
- Tens digit: 5 → 5 ≥ 5, so round up
- 3 + 1 = 4 → 400

✔ 400

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#### 15. 249
- Hundreds digit: 2
- Tens digit: 4 → 4 ≤ 4, so keep it
- → 200

✔ 200

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#### 16. 856
- Hundreds digit: 8
- Tens digit: 5 → 5 ≥ 5, so round up
- 8 + 1 = 9 → 900

✔ 900

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✔ Final Answers:

| Number | Rounded to nearest hundred |
|--------|---------------------------|
| 570 | 600 |
| 126 | 100 |
| 446 | 400 |
| 290 | 300 |
| 233 | 200 |
| 377 | 400 |
| 199 | 200 |
| 677 | 700 |
| 818 | 800 |
| 409 | 400 |
| 899 | 900 |
| 564 | 600 |
| 327 | 300 |
| 352 | 400 |
| 249 | 200 |
| 856 | 900 |

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📝 Summary:

Use the rounding rhyme:
- Underline the hundreds digit.
- Look at the tens digit.
- If it's 5 or higher, add 1 to the hundreds digit.
- If it's 4 or lower, leave the hundreds digit unchanged.
- Change the last two digits to 00.

This method helps you quickly estimate numbers to the nearest hundred!