Audrey Math

Scott and Audrey were playing Three Billy Goats Gruff in the bathtub. They had four fish, and Scott said they needed three fish to be the billy goats, and asked Audrey how they could make four into three. She thought about it, then split the four into two groups of two. Scott had her count the fish, then asked again how she could make four into three. She said, "You do it." So Scott took one fish away and asked, "Now how many fish are there?" Audrey knocked the rest of the fish into the tub and announced, "Zero!"