← All Grades

Grade 3

CCSS Math Standard: 3.OA.9

Identify arithmetic patterns (including patterns in the addition table or multiplication table), and explain them using properties of operations. For example, observe that 4 times a number is always even, and explain why 4 times a number can be decomposed into two equal addends.

  • Evens and Odds – Addition and Subtraction

    When we're adding and subtracting, do evens make odds into evens? Do odds make evens odd? Which one has… more power!?

  • Create Your Own Operation

    The commutative and associative properties are a whole lot more interesting when you apply them to a mathematical operation that you created!

  • Doubling Dollars

    Say you have a dollar. Say you can double that dollar each day: $1, $2, $4, and so on. How long will it take to reach… one million dollars? Not as long as you might think!