Have a look at the next video.

 

What rectangle would you use to represent 5 • 3 ? 

☐ A 5 by 3 rectangle of yellow tiles.

☐ A 5 by 3 rectangle of red tiles

☐ You cannot represent 5 • 3 using a rectangle, because it doesn't make sense to have negative groups of yellow tiles. 

☐ I'd like to review an earlier video.