Doubling Multiples of Five (297)

Standards

Printable Aids

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 multiples of 5 by 2, helping students recognize patterns and develop fluency in multiplication. **Worked Example:** 2 x 55 worked example **Problem:** 2 x 55 **Strategy:** Think of doubling the number: 55 + 55 = 110. **Hints:** - Use repeated addition to find the answer. **Steps:** - Multiply 2 by 55 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 double the multiple of 5.
• Confusing multiplication with addition (e.g., 2+10 instead of 2x10).
• Incorrectly skip-counting by 5s or 2s when solving.

Differentiation

Discussion Questions

• What strategy did you use?
• Which problem was easiest?
• What patterns do you notice in the answers when multiplying by 2?
• How is multiplying by 2 similar to adding a number to itself?
• Can you predict the next product if you continue multiplying multiples of 5 by 2?
• Why do all of your answers end in 0?

Extension Activities

• Create flashcards.
• Peer teaching.

Parent Tip

Have your child double amounts like 15 cents or 25 cents.

Skill Cluster

Number Sense & Operations

Estimated Time

15 minutes

Skills Practiced

Prerequisites

• Skip Counting by 5s
• Skip Counting by 2s
• Repeated Addition

Next Steps

• Multiplication Facts for 2s and 5s
• Multiplication as Arrays
• Two times multiples of 10
• Five times numbers
• Skip counting by 2s