. Grade 3, Illustrative icon

Symmetry of the addition table

Illustrative MathematicsVaries

The goal of this task is to help students understand the commutative property of addition by examining the addition facts for single digit numbers. This is important as it gives students a chance, at a young age, to do more than memorize these arithmetic facts which they will use throughout their education. The approach taken here is a geometric one, associating the commutative property of addition with the symmetry of the addition table. Students don't 'officially' study symmetry until 4th grade, so this task defines the particular symmetry for them.

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