2.NBT.A.1 — Understand that the three digits of a three-digit number represent hundreds, tens, and ones.
Cluster: Understand place value
What this standard asks students to do
2.NBT.A.1 is a 2nd grade Common Core standard in the Number & Operations in Base Ten strand. It asks students to: understand that the three digits of a three-digit number represent hundreds, tens, and ones. Teachers typically address it during the understand place value cluster, alongside the related standards listed below. FoxFish generates printable worksheets, auto-graded quizzes, and flashcard sets aligned to this standard in seconds.
Sample questions aligned to 2.NBT.A.1
- Example 1
What does the 4 in 487 mean?
- Example 2
Write 6 hundreds, 0 tens, 9 ones.
- Example 3
How many tens are in 320?
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Common student mistakes
Build distractors and reteach prompts around the errors students actually make on this standard.
- 1Confusing the meaning of digits in numbers like 405 ('what does the zero do?').
- 2Writing 304 as 'three hundred and forty' (place-value confusion when there's a zero in the tens place).
- 3Counting hundreds blocks but losing the bundling — saying '23 hundreds' instead of '2 thousand 3 hundred.'
Teacher FAQ
What's a 'bundle of 10 tens' and why does CCSS mention it?
It's the conceptual move from tens to hundreds. A student who sees 100 as 10 bundles of 10 (not just 'the next number after 99') is ready for multi-digit operations. Use base-ten blocks where 10 ones-rods physically lock into a hundreds-flat.
Related standards in this cluster
Teacher guides for 2.NBT.A.1
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