Skills Covered

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 — Determine whether a group of objects has an odd or even number of members
• 1.OA.C.5 — Relate counting to addition and subtraction