Virginia SOL 1.NS.2.c
The Standard
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 ones or it can be grouped into 4 tens with 7 ones left over).
Virginia Standards of Learning for Mathematics · The student will represent, compare, and order quantities up to 120.
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students group objects into sets of ten and identify any ones left over. They make a model or drawing, then write the numeral that matches the quantity.
What Mastery Looks Like
- A student can model any given number through 120 with bundled objects or a clear drawing. The student can write the matching numeral and explain how the tens and leftover ones show its value.
Common Misconceptions
- Students may treat each bundle of ten as one object rather than ten. They may reverse the digits, draw the wrong number of ones, or think every number needs leftover ones.
How to Assess It
- Give this exit ticket: “Build or draw 86 using tens and ones, then write the numeral and label each group.”
Lesson moves
Ways to Teach It
Give pairs 68 craft sticks and rubber bands, then have them make bundles of ten and record the tens, ones, and numeral.
Show 53 as five tens and three ones, then ask students to explain why it represents the same amount as 53 loose counters.
Students draw number cards, build each number with base-ten blocks, and earn a point when a partner confirms the matching numeral.
Count 84 classroom pencils, place groups of ten into cups, and record the number of full cups and leftover pencils.
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Printable 1.NS.2.c Worksheet
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Related Standards
- 2.NS.2.a
Write the three-digit whole number represented by a given model (e.g., concrete objects, pictures of base 10 blocks).
- K.CE.1.d
Use objects, drawings, words, or numbers to compose and decompose numbers less than or equal to 10 in multiple ways.
- 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...
- K.NS.1.i
Use objects, drawings, words, or numbers to compose and decompose numbers 11-19 into a ten and some ones.
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