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First/Place Value Rounding

🔢 Place Value: Compose 3-Digit Numbers

Compose and decompose 3-digit numbers using hundreds, tens, and ones; convert between expanded and standard form.
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🔢 Place Value: Compose 3-Digit Numbers preview

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Practice Questions

  1. 200 + 50 + 7 = ?
    Show answer

    257

  2. 800 + 30 + 6 = ?
    Show answer

    836

  3. 400 + 10 + 9 = ?
    Show answer

    419

  4. 500 + 0 + 8 = ?
    Show answer

    508

  5. 700 + 60 + 0 = ?
    Show answer

    760

Teacher Resources
Teaching Notes

Reinforce the value of each digit's position. Emphasize that numbers are built from hundreds, tens, and ones.

Vocabulary
Compose: To put together or build.
Expanded Form: Showing a number as a sum of place values.
Common Mistakes
  • Misplacing digits when a place value is zero.
  • Confusing hundreds, tens, and ones positions.
  • Incorrectly combining parts, especially with missing tens or ones.
Differentiation
SupportUse base-ten blocks or place value charts for visual support.
ChallengeChallenge with larger numbers or numbers with missing place values.
Discussion Questions
  • How does expanded form help us understand the value of each digit?
  • What does it mean if a number has a zero in the tens place?
  • How is 235 different from 532, even though they use the same digits?
  • Can you compose a number if you know the hundreds, tens, and ones?
Extension Activities
  • Write numbers in expanded form.
  • Practice composing 4-digit numbers.
  • Use base-ten blocks.
Parent Tip

Use blocks or objects to represent hundreds, tens, and ones.

Learning Path
Skill Cluster

Number Sense: Place Value

Estimated Time

15 minutes

Skills Practiced
Composing 3 digit numbersExpanded form to standardPlace value 3 digit