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Rounding Whole Numbers

Round multi-digit whole numbers to any place.

Written and reviewed by the Study Mondo Education TeamLast updated
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Rounding Whole Numbers

Rules for Rounding

  1. Find the rounding place (the digit you're rounding to)
  2. Look at the digit one place to the right
  3. If that digit is 5 or more, round up
  4. If that digit is 4 or less, round down (keep the same)
  5. Change all digits to the right of the rounding place to 0

Examples

Round 3,742 to the nearest hundred:

  • Hundreds digit: 7
  • Digit to the right: 4 (less than 5)
  • Round down: 3,700 ✅

Round 8,561 to the nearest thousand:

  • Thousands digit: 8
  • Digit to the right: 5 (5 or more)
  • Round up: 9,000 ✅

Round 45,283 to the nearest ten thousand:

  • Ten thousands digit: 4
  • Digit to the right: 5 (5 or more)
  • Round up: 50,000 ✅

Why We Round

Rounding helps us estimate answers quickly:

  • About how many students are in the school?
  • Approximately how much will these items cost?

Estimation with Rounding

To estimate 3,847+2,1563,847 + 2,156:

  • Round: 3,800+2,200=6,0003,800 + 2,200 = 6,000 (to nearest hundred)
  • Or: 4,000+2,000=6,0004,000 + 2,000 = 6,000 (to nearest thousand)

Tip: The actual answer is 6,003. Our estimate was very close!

Explain using:
← Previous Topic
Understanding Place Value
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📌 Related Topics in Place Value and Rounding

Understanding Place Value

❓ Frequently Asked Questions

What is Rounding Whole Numbers?▾
Round multi-digit whole numbers to any place.
How can I study Rounding Whole Numbers effectively?▾
Start by reading the study notes and working through the examples on this page. Then use the flashcards to test your recall. Regular review and active practice are key to retention.
Is this Rounding Whole Numbers study guide free?▾
Yes — all study notes, flashcards, and practice problems for Rounding Whole Numbers on Study Mondo are free to access. No account is needed.
What course covers Rounding Whole Numbers?▾
Rounding Whole Numbers is part of the Grade 4 Math course on Study Mondo, specifically in the Place Value and Rounding section. You can explore the full course for more related topics and practice resources.