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Rounding Whole Numbers

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Rounding Whole Numbers

Rounding numbers illustration

📚 Part 1: Rounding to the Nearest Ten

WALT: Round whole numbers to the nearest ten and hundred using place value knowledge.

Remember: If the ones digit is 5 or more, round UP. If the ones digit is less than 5, round DOWN.

1. Round 34 to the nearest ten.

30

40

35

2. Round these numbers to the nearest ten:

a) 23 rounds to _______               c) 45 rounds to ________

b) 88 rounds to _______              d) 91 rounds to ________



🎯 Part 2: Rounding to the Nearest Hundred

Remember: Look at the tens digit. If it's 5 or more, round UP. If it's less than 5, round DOWN.

4. Round 143 to the nearest hundred.

100

140

200

5. Round these numbers to the nearest hundred:

a) 236 rounds to _______

b) 582 rounds to _______

c) 750 rounds to _______

d) 419 rounds to _______

6. A school has 348 students. Round this to the nearest hundred to estimate how many students attend the school.

💰 Part 3: Real-World Rounding

7. You're shopping and need to estimate costs. Round each price to the nearest ten dollars:

a) A backpack costs $47. Estimate: $ _______

b) A calculator costs $23. Estimate: $ _______

c) A lunch box costs $15. Estimate: $ _______

8. Explain in your own words: Why is rounding useful in everyday life?
9. Extension Challenge: Round 1,847 to the nearest thousand.

Answer: _____________

Explain your thinking: ________________________________

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