Evens and Odds – Addition and Subtraction

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Students will explore the rules of how adding and subtracting evens and odds leads to either evens or odds. They'll try to explain the why and also answer the question: which has more power, evens or odds?


  1. Students explain why adding two evens always leads to an even.
  2. Students find the rules for even+odd, odd+even, and odd+odd and attempt to explain why these are rules.
  3. They do the same for subtraction: what happens when we subtract even-even, even-odd, odd-even, and odd-odd? Why?
  4. Finally, your students will consider, after all this, which has more power: evens or odds?


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Related CCSS Math Standards

Grade 3

Grade 4