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Grade 3 - Operations and Algebraic Thinking
Standard 3.OA.D.9 - Complete the table with numbers up to 100 by applying the addition rule to the left column to get the result in the right column.
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.