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Common Core State Standard 2.OA.3
Operations & Algebraic Thinking
Work with equal groups of objects to gain foundations for multiplication.
3. 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.
Common Core State Standards: 2.OA.3
Odd
or Even Worksheet
Common Core State Standards:
CCSS 2.OA.3 
Students must determine if given numbers are odd or even by shading boxes. Students determine even numbers by seeing if the number can be placed into two equal groups.
Odd
or Even Worksheets
Common Core State Standards:
CCSS 2.OA.3 
Students must determine if given numbers are odd or even by circling pairs of ovals. Students determine even numbers by seeing if the number can be placed into two equal groups.
Odd
or Even Worksheet
Common Core State Standards:
CCSS 2.OA.3 
Even numbers can be represented by a doubles addition fact. Students represent each even number in a doubles addition fact.
Odd
or Even Worksheets
Common Core State Standards:
CCSS 2.OA.3 Primer, Prerequisite
Various worksheets dealing with odd and even numbers.