Expanded Form (4–6 Digits) (727)

Teaching Notes

Model with base-ten blocks or a place value chart. Read numbers by periods and translate to sums.

Vocabulary

Expanded Form: Number written as sum of digit values.

Place Value: Position of a digit determines its value.

Common Mistakes

• Writing wrong number of zeros
• Dropping a place with zero
• Forgetting zeros for missing place values
• Incorrectly identifying place values
• Transposing digits or values
• Not writing as a sum

Differentiation

Discussion Questions

• How does the digit’s place change its value?
• Why include terms that are zero?
• Why is expanded form helpful for understanding numbers?
• How does expanded form show the value of each digit?
• What happens if you miss a zero in expanded form?
• Can you write a number in expanded form using words?

Extension Activities

• Write alternative but equivalent expanded forms
• Match a number to multiple valid expanded forms

Parent Tip

Have your child write their age in expanded form.

Skill Cluster

Number Sense & Place Value

Skills Practiced

Prerequisites

• 719
• Place Value (Up to 3 Digits)
• Understanding Whole Numbers

Next Steps

• Comparing Multi-Digit Numbers
• Rounding Multi-Digit Numbers
• Standard Form (4–6 Digits)
• Word Form (4–6 Digits)
• Place Value (Up to 6 Digits)