Even or Odd 1-20

Learn to identify even and odd numbers from 1 to 20! This interactive activity helps first graders understand the difference between even and odd numbers by recognizing patterns and using pairing strategies.

Practice these skills:

• Recognize that even numbers can be paired without leftovers (2, 4, 6, 8, 10…)
• Understand that odd numbers have one leftover when paired (1, 3, 5, 7, 9…)
• Identify the pattern in the ones place: even numbers end in 0, 2, 4, 6, 8
• Use pairing strategies to determine if a number is even or odd
• Build number sense and prepare for division concepts

How it works: Look at the number or picture, decide if it’s even or odd, and select your answer. You’ll get instant feedback with helpful explanations!

Tips for success:

• Pairing trick: Imagine making pairs of objects. If nothing is left over, it’s even. If one is left alone, it’s odd!
• Look at the last digit: Even numbers always end in 0, 2, 4, 6, or 8. Odd numbers end in 1, 3, 5, 7, or 9.
• Count by 2s: If you can count to the number by 2s (2, 4, 6…), it’s even!

Aligned with U.S. Grade 1 Math Standards (introduction to 2.OA.C.3).