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First/Multiplication

Multiply Whole Tens by Whole Tens

Practice multiplying whole tens by whole tens (10 × 20, 30 × 40, etc.).
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Study Guide

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Practice Questions

  1. 10 × 50 = ?
    Show answer

    500

  2. 20 × 30 = ?
    Show answer

    600

  3. 40 × 20 = ?
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    800

  4. 30 × 50 = ?
    Show answer

    1,500

  5. 60 × 10 = ?
    Show answer

    600

Teacher Resources
Standards
3.NBT.A.3
Printable Aids
Place Value ChartBase Ten Blocks
Teaching Notes

This activity reinforces multiplication using place value strategies. Emphasize how basic facts and powers of ten simplify larger multiplication problems.

Vocabulary
Whole Tens: Numbers like 10, 20, 30, ending in zero.
Product: The result of multiplication.
Common Mistakes
  • Forgetting to include all the zeros in the product (e.g., 20x30=60).
  • Incorrect basic multiplication facts (e.g., 2x3=5).
  • Confusing multiplication with addition of zeros (e.g., 20x30=6000).
Differentiation
SupportUse base-ten blocks or open arrays to visualize the products.
ChallengeIntroduce problems with whole tens multiplying by whole hundreds (e.g., 20x300).
Discussion Questions
  • How is multiplying 20 x 30 related to multiplying 2 x 3?
  • What pattern do you notice in the number of zeros when you multiply whole tens?
  • How does understanding place value help you solve these problems?
  • Can you think of a real-world situation where you might need to multiply whole tens?
Extension Activities
  • Use base-ten blocks.
  • Relate to skip counting.
  • Practice with larger multiples.
Parent Tip

Ask: 'If 30 people each bring 40 cookies, how many cookies are there?'

Learning Path
Skill Cluster

Number Sense & Operations

Grade Level

3-4

Skills Practiced
Multiply tens by tensPlace value understanding