Virtual Nerd
Virtual Nerd: Commutative Property of Addition
Learn how to work problems using the commutative property of addition. [4:00]
Khan Academy
Khan Academy: Arithmetic Properties: Commutative Law of Addition
This video explains the commutative law of addition. Practice problems are available. [1:40]
PBS
Pbs: Odd Squad: Bear Scan
Agent Oscar scans the Bears basketball team to see if they're carrying the number 13.