Long description

A picture of three number lines. The first number line shows the interval between 0 and 1/2 with 1/4 marked in the middle. The second number line shows the interval between 0 and 1/2 with 1/8, 1/4 and 3/8 marked on the number line. The third number line shows the interval between 0 and 1/2 with 1/16, 1/8, 3/16, 1/4, 5/16, 3/8 and 7/16 marked on the number line.