CCSS.MATH.4.NBT.A.2✓ California Department of Education (CDE) AlignedAcademic Year 2026–27
Reading, Writing & Comparing Multi-Digit Whole Numbers
Translate between numeral, word, and expanded forms and compare quantities up to 1,000,000 using relational symbols (<, =, >).
Why It Matters:Crucial for financial checks, national census data analysis, and geographic distance comparisons.
Curated Video Instruction
● Verified Active EmbedSTEP-BY-STEP PROOF
Worked Example
Write 408,520 in expanded form and compare it to 408,250:
1
Decompose into place value addends
400,000 + 8,000 + 500 + 20
Break each non-zero digit into its column contribution.
2
Compare largest differing column
Both have 408,000; compare hundreds: 500 vs 200
Since 500 > 200, the first number is greater.
3
Write inequality statement
408,520 > 408,250
The symbol points to the smaller quantity.
✓Verification Check
Subtract: 408,520 - 408,250 = +270 (positive indicates greater).
408,520 - 408,250 = 270
•
270 > 0 (Verified)
⚠️ Common Pitfalls & Misconceptions
Ignoring zeros in expanded form
✗ Writing 408,520 as 400,000 + 80,000 + ...✓ The 0 ten-thousands contributes 0; the 8 is in thousands (8,000)
Zero acts as an essential placeholder for unoccupied columns.
INTERACTIVE DRILLS
Guided Practice
Practice Question1 of 1
Step-by-step Feedback
Which statement correctly compares 52,409 and 52,490?
MASTERY BENCHMARK
Official Assessment Quiz
Formal Assessment
Reading, Writing & Comparing Multi-Digit Whole Numbers
Passing Criteria:70% or higher
Question 1 of 1
What is the standard numeral for: 300,000 + 40,000 + 600 + 5?
Education to Career Navigation
Where This Lesson Leads
Bank Managers and Surveyors write and verify numerical legal documents.