Rounding to the Nearest Hundred worksheet with number rounding exercises and bubble number activities.

Let's solve each part of this worksheet step by step.

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Part 1: Round each number to the nearest hundred

To round to the nearest hundred, look at the tens digit:
- If the tens digit is 5 or more, round up.
- If the tens digit is less than 5, round down.

#### 264
- Tens digit = 6 → 6 ≥ 5 → Round up
- 264 → 300

#### 85
- Tens digit = 8 → 8 ≥ 5 → Round up
- 85 → 100

#### 545
- Tens digit = 4 → 4 < 5 → Round down
- 545 → 500

#### 239
- Tens digit = 3 → 3 < 5 → Round down
- 239 → 200

#### 350
- Tens digit = 5 → 5 ≥ 5 → Round up
- 350 → 400

#### 834
- Tens digit = 3 → 3 < 5 → Round down
- 834 → 800

✔ Answers:
- 264 → 300
- 85 → 100
- 545 → 500
- 239 → 200
- 350 → 400
- 834 → 800

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Part 2: Bubble Numbers

Numbers in bubbles:
572, 748, 650, 635, 762, 804

We need to find which two numbers round to 700 and which two round to 600.

#### Rounding each:
- 572: Tens digit = 7 → Round up → 600
- 748: Tens digit = 4 → Round down → 700
- 650: Tens digit = 5 → Round up → 700
- 635: Tens digit = 3 → Round down → 600
- 762: Tens digit = 6 → Round up → 800
- 804: Tens digit = 0 → Round down → 800

Now:
- Numbers that round to 700: 748 and 650
- Numbers that round to 600: 572 and 635

✔ Answers:
- Which two bubble numbers round to 700? → 748 and 650
- Which two bubble numbers round to 600? → 572 and 635

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Part 3: Write 4 numbers that round to 400

Any number between 350 and 449 will round to 400.

Examples:
- 350 (rounds up)
- 380
- 400
- 425
- 449 (rounds down)

So, pick any four:
✔ Examples: 360, 390, 400, 430

(You can write any 4 numbers from 350–449.)

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Part 4: True or False

#### 765 rounds to 700
- Tens digit = 6 → Round up → 800
- So, 765 → 800, not 700
→ False

#### 829 rounds to 800
- Tens digit = 2 → Round down → 800
- Yes, 829 → 800
→ True

#### 109 rounds to 100
- Tens digit = 0 → Round down → 100
- Yes, 109 → 100
→ True

✔ Answers:
- 765 rounds to 700 → False
- 829 rounds to 800 → True
- 109 rounds to 100 → True

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✔ Final Answer Summary:

#### Round to nearest hundred:
- 264 → 300
- 85 → 100
- 545 → 500
- 239 → 200
- 350 → 400
- 834 → 800

#### Bubble Numbers:
- Round to 700: 748 and 650
- Round to 600: 572 and 635

#### Write 4 numbers that round to 400:
Example: 360, 390, 400, 430 (any 4 numbers from 350–449)

#### True or False:
- 765 rounds to 700 → False
- 829 rounds to 800 → True
- 109 rounds to 100 → True

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