Virginia SOL 2.NS.2.a
The Standard
Write the three-digit whole number represented by a given model (e.g., concrete objects, pictures of base 10 blocks).
Virginia Standards of Learning for Mathematics · The student will demonstrate an understanding of the ten-to-one relationships of the base 10 number system to represent, compare, and order whole numbers up to 999.
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students identify how many hundreds, tens, and ones appear in a model. They use those amounts as digits to write one three-digit numeral, including zeros when needed.
What Mastery Looks Like
- Students correctly read models with hundreds, tens, and ones, including models with an empty place. They can explain how each group determines a digit in the numeral.
Common Misconceptions
- Students may count each block as one instead of using its place value. They may reverse the tens and ones digits or leave out a zero when no blocks appear in a place.
How to Assess It
- Draw 4 hundreds flats, 0 tens rods, and 7 ones cubes. Ask students to write the number and state each digit’s value.
Lesson moves
Ways to Teach It
Give pairs base ten blocks, have one student build a number, then ask the partner to write and explain the numeral.
Ask, “A model has 3 hundreds, 0 tens, and 8 ones; why is the number 308 instead of 38?”
Play a matching game using cards that show base ten models and cards that show corresponding three-digit numerals.
Model pencil inventory with cartons of 100, packs of 10, and single pencils, then write the total as a numeral.
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Printable 2.NS.2.a Worksheet
A ready-to-print activity worksheet aligned to 2.NS.2.a, with an answer key for the teacher on its own page. No account needed.
PDF, US Letter, prints cleanly in black and white.
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Related Standards
- 3.NS.1.c
Compose, decompose, and represent numbers up to 9,999 in multiple ways, according to place value (e.g., 256 can be 1 hundred, 14 tens, 16 ones, but also 25 tens...
- 1.NS.2.c
Create a concrete or pictorial representation of a number using tens and ones and write the corresponding numeral up to 120 (e.g., 47 can be represented as 47 o...
- 2.NS.2.b
Read, write, and represent three-digit numbers in standard form, expanded form, and word form, using concrete or pictorial representations.
- 2.NS.2.e
Compose and decompose whole numbers up to 200 by making connections between a variety of models (e.g., base 10 blocks, place value cards, presented orally, in e...
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