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First/Multiplication

Missing Factor: Twos, Fives, and Tens

Practice finding the unknown factor for 2, 5, and 10 times tables combined.
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Study Guide

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Missing Factor: Twos, Fives, and Tens preview

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Practice Questions

  1. ? × 10 = 20
    Show answer

    2

  2. 5 × ? = 40
    Show answer

    8

  3. 2 × ? = 16
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    8

  4. ? × 5 = 45
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    9

Quick Tip
Think: what number times the given factor equals the product? You can also divide the product by the known factor.
Teacher Resources
Standards
3.OA.A.4
Printable Aids
Mixed multiplication chart
Teaching Notes

Emphasize fact families and the inverse relationship between multiplication and division. Use known facts for 2, 5, and 10 to find missing numbers.

Vocabulary
Factor: A number multiplied to get a product.
Product: The result of multiplication.
Common Mistakes
  • Confusing the rule for one table with another.
  • Incorrect fact recall
  • Confusing operations
  • Guessing instead of solving
  • Not checking answers
Differentiation
SupportUse visual aids, skip counting, or a multiplication chart.
ChallengeSolve multi-step problems or use larger factors.
Discussion Questions
  • How can you use division to find a missing factor?
  • What patterns help remember 2, 5, 10 facts?
  • Why is it important to know multiplication facts?
  • How can you check your answer?
Extension Activities
  • Create division stories.
  • Practice fact families.
Parent Tip

Use objects to show groups and ask how many are in each group.

Learning Path
Skill Cluster

Number Sense and Operations

Estimated Time

15 minutes

Skills Practiced
Foundational Fact Fluency