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Fourth/Multiplication

Doubling Multiples of Ten

Practice multiplying whole tens by 2 to build fluency in basic multiplication. These exercises help students recognize patterns in multiplying by 2.
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WorksheetsTeacher InfoLearning Path

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Prerequisites
Doubling Multiples of Five10 WS
2 x 55 = ____
What to Do Next
Missing Factors: Two and Multiples of Ten6 WS
____ x 80 = 180

Practice Questions

  1. 2 x 10 = ?
    Show answer

    20

  2. 2 x 20 = ?
    Show answer

    40

  3. 2 x 30 = ?
    Show answer

    60

  4. 2 x 40 = ?
    Show answer

    80

  5. 2 x 50 = ?
    Show answer

    100

Teacher Resources
Standards
3.OA.A.1
Printable Aids
Multiplication ChartSkip Counting Number Line
Teaching Notes

Focus on fluency and pattern recognition. Encourage students to visualize groups or use repeated addition strategies. Accuracy should come before speed.

Instruction Tips: These worksheets focus on multiplying whole tens by 2, helping students develop fluency and recognize patterns in multiplication.

Worked Example: 2 x 70 worked example

Problem: 2 x 70

Strategy: Think of doubling the number: 70 + 70 = 140.

Hints:

  • Use repeated addition to find the answer.

Steps:

  • Multiply 2 by 70 to get the answer.
Vocabulary
Multiple: The result of multiplying a number.
Product: The answer to a multiplication problem.
Common Mistakes
  • Confusing operation symbols (+ vs x)
  • Skip-counting errors
  • Forgetting to include the zero in the product (e.g., 2 x 30 = 6).
  • Confusing addition with multiplication (e.g., 2 + 30 instead of 2 x 30).
  • Incorrect basic doubling facts (e.g., 2 x 7 = 12, affecting 2 x 70).
Differentiation
SupportProvide manipulatives or a number line.
ChallengeChallenge students to create word problems for the equations.
Discussion Questions
  • What strategy did you use?
  • Which problem was easiest?
  • How is multiplying by 20 like multiplying by 2?
  • What pattern do you notice when multiplying any whole ten by 2?
  • Can you explain why 2 x 40 equals 80?
  • How can knowing 2 x 5 help you find 2 x 50?
Extension Activities
  • Create flashcards.
  • Peer teaching.
Parent Tip

Ask your child to double numbers like 20, 40, or 60.

Learning Path
Skill Cluster

Multiplication & Place Value

Estimated Time

15 minutes

Skills Practiced
Basic multiplication