Second Graders use Rectangular Arrays to find the total number of buttons by using repetitive addition. Through the Commutative property of multiplication, students can add the columns or rows and still reach the same answer.
There are twenty arrays. Students should practice adding the columns, then and the rows to see if the answer is the same. Give one center one set of buttons, and another center the other set. After they solve the problems, the centers can trade sets.
I would love and appreciate your feedback even if it’s just to say thank you. Thanks, I really appreciate you taking the time! Donna