CCSS.Math.Content.4.NBT.A
The standard
Generalize place value understanding for multi-digit whole numbers.
Common Core State Standards for Mathematics
What this standard means
Students need to see that each place in a whole number is worth ten times the place to its right. They should read, write, compare, and round multi-digit numbers using place value, not just memorized steps. They need to explain why 7 in 70,000 means something different from 7 in 700.
Mastery looks like flexible thinking with numbers through one million. Students can use base-ten blocks, place value charts, number lines, and expanded form to justify answers. Common trouble spots are comparing numbers with different lengths, rounding based only on the digit being changed, and treating digits as single numbers without value.
Ways to teach it
- Build 6-digit numbers with digit cards and a place value mat, then trade one ten-thousands card for ten thousands cards.
- Ask students to explain which is greater, 408,219 or 48,921, and prove it without saying “it has more digits.”
- Give three numbers to round to the nearest ten, hundred, and thousand, then have students mark the rounding digit and clue digit.
- Use a grocery warehouse inventory sheet and ask students to compare, order, and round item counts for a stock report.
Plan a lesson for CCSS.Math.Content.4.NBT.A
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Related standards
- CCSS.Math.Content.1.NBT.B
Understand place value.
- CCSS.Math.Content.4.NBT.A.3
Use place value understanding to round multi-digit whole numbers to any place.
- CCSS.Math.Content.2.NBT.A
Understand place value.
- CCSS.Math.Content.3.NBT.A
Use place value understanding and properties of operations to perform multi-digit arithmetic.