"Hi! I'm here with Amanda Bear today to talk about the Commutative Property of Addition. We're going to use this gum ball machine to demonstrate that buying a gum ball from a machine is not commutative."

 

 

"Amanda wants some gum from this machine. Before she can get it; she must first put money into the machine. This is not a commutative operation. If it were, Amanda could get the gum ball and then put the money in the machine."

 

"But if I use a hammer, the operation is commutative. I can get as many gumballs as I want and I don't have to pay for them if I don't want to." "No! No! Amanda Your wrecking the demonstration. Oh well, contunue onto next page to learn more."

 

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