Georgia K.NR.5.1
The Standard
Compose (put together) and decompose (break apart) numbers up to 10 using objects and drawings.
Georgia's K-12 Mathematics Standards · Explain the concepts of addition, subtraction, and equality and use these concepts to solve real-life problems within 10.
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students put two groups together to make a number up to 10. They also break a number into smaller groups and show their thinking with objects or pictures.
What Mastery Looks Like
- Students make a number up to 10 by joining two groups of objects. They break a group into smaller parts and show more than one possible split with objects or drawings.
Common Misconceptions
- Students may count the same object twice or skip an object when making parts. They may also think a number can be split only one way, such as seeing 5 only as 2 and 3.
How to Assess It
- Give each student 7 counters and ask, “Show two different ways to break 7 into two parts. Draw both ways.”
Lesson moves
Ways to Teach It
Give students 8 counters and two paper plates, then have them find and draw three ways to split the counters between the plates.
Show 6 dots and ask, “How could you break 6 into two parts?” Have students explain their drawings to a partner.
Play Make 10 with number cards, where students match two cards whose quantities combine to make 10.
Set out 9 toy apples and two baskets, then ask students to find different ways to divide the apples between the baskets.
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Printable K.NR.5.1 Worksheet
A ready-to-print activity worksheet aligned to K.NR.5.1, 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
- 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.
- 2.PAR.4.2
Identify, describe, and create growing patterns and shrinking patterns involving addition and subtraction up to 20.
- K.NR.3
Use place value understanding to compose and decompose numbers from 11–19.
- K.NR.4
Identify, write, represent, and compare numbers up to 20.
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