Georgia 2.NR.1.1
The Standard
Explain the value of a three-digit number using hundreds, tens, and ones in a variety of ways.
Georgia's K-12 Mathematics Standards · Using the place value structure, explore the count sequences to represent, read, write, and compare numerical values to 1000 and describe basic place-value relationships and structures.
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students break a three-digit number into hundreds, tens, and ones. They explain the same number in different forms, including regrouping hundreds as tens or tens as ones.
What Mastery Looks Like
- A student can explain that 583 contains 5 hundreds, 8 tens, and 3 ones. The student can also rename it as 58 tens and 3 ones or 583 ones.
Common Misconceptions
- Students may read each digit separately or think a digit has the same value in every position. They may also confuse 406 with 46 or overlook that one hundred equals ten tens.
How to Assess It
- Write 472 on an exit ticket. Ask students to show it in two different ways using hundreds, tens, and ones, then explain the value of 7.
Lesson moves
Ways to Teach It
Have students build a number with base-ten blocks, then trade one hundred for ten tens and record both forms.
Ask students to explain in writing how 326 and 362 differ, using the value of each digit.
Play a number card game where students draw three digits, form a number, and state each digit’s value.
Use a school supply order, such as 245 pencils, and represent the quantity as boxes of hundreds, packs of tens, and singles.
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Printable 2.NR.1.1 Worksheet
A ready-to-print activity worksheet aligned to 2.NR.1.1, with an answer key for the teacher on its own page. No account needed.
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Related Standards
- K.NR.3.1
Describe numbers from 11 to 19 by composing (putting together) and decomposing (breaking apart) the numbers into ten ones and some more ones.
- 1.NR.1.2
Explain that the two digits of a 2-digit number represent the amounts of tens and ones.
- 4.NR.1
Recognize patterns within the base ten place value system with quantities presented in real-life situations to compare and round multi-digit whole numbers throu...
- 5.NR.1.1
Explain that in a multi-digit number, a digit in one place represents 10 times as much as it represents in the place to its right and 1/10 of what it represents...
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