4 red and 4 white cubes and said, “I know this one because I made it.” For the
next combination of 3 5, Kailey quickly found the cube train of 3 red and 5
white. She said, “I just saw the 3 and I didn’t have to count the 5.” Nicole chose
the train of 3 white and 5 red. She referred to Kailey’s comment: “I saw the
What’s Another Way to Make 9?Figure 13–2.