Count the dots and compare.
The number of dots on A is the number of dots on B.
At a parking lot, there is a red car that is 12 feet long, a yellow car that is 4 feet shorter than the red one, and a blue car that is 2 feet longer than the red one. Which is the shortest car?
Count and compare the number of stars. The number of stars in group A is the number of the stars in group B.