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Skills Covered

  • Identify odd numbers
  • Identify even numbers
  • Distinguish odd from even visually
  • Recognize number patterns
  • Build classification skills
  • Strengthen number sense within 20

How to Use These Worksheets

Students look at a group of numbers and circle all the odd (or even) ones. A visual way to practice identifying odd and even numbers within 20.

In the Classroom

Use for quick assessment or math warm-ups. Have students explain how they decided whether a number is odd or even to build reasoning skills.

At Home

Practice by counting objects in pairs - if one is left over, the number is odd. Try sorting toys or snacks to make the concept hands-on.

Tips for Success

  • Even numbers end in 0, 2, 4, 6, or 8
  • Odd numbers end in 1, 3, 5, 7, or 9
  • Use the answer key for self-checking

Common Core Standards Alignment

These worksheets support the following Common Core State Standards for Mathematics:

  • 2.OA.C.3 Decide if up to 20 objects are odd or even (match them in twos or skip count by 2s); write evens as doubles.

© Copyright 2010. National Governors Association Center for Best Practices and Council of Chief State School Officers. All rights reserved.

Odd & Even: Circle the Number

1st – 2nd Grade

Circle all the odd or even numbers in each group. A visual way to practice identifying odd and even numbers within 20.

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What’s Included

  • 6 unique worksheets
  • Numbers within 1-20
  • Circle the odd or even format
  • Multiple problems per page
  • Answer keys included
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