2.OA.3

Standard

Determine whether a group of objects (up to 20) has an odd or even number of members, e.g., by pairing objects or counting them by 2s; write an equation to express an even number as a sum of two equal addends.


Student language:

    • "I can group objects to tell if a number is odd or even."

Explanation

About the Math, Learning Targets, and Rigor

This standard calls for students to apply their work with double addition facts to the concept of odd or even numbers. Students should explore this concept with concrete objects (e.g., counters, place value cubes, etc.) before moving towards pictorial representations such as circles or arrays.

Common Misconception

Students will look at the number of digits to determine if the number is odd or even instead of the quantity itself. Example: 53 is an even number because it has 2 digits. This is a misconception. Students will determine whether a number is odd or even by the first digit in the number instead of the digit in the ones place.

Resources

Videos


EngageNY Lessons


Extra Practice