On the coordinate ray, mark the points with coordinates 3 / 8,1 / 4,1 / 2, which unit segment is convenient to take

Let’s first bring all these fractions to the same denominator. Here it will be convenient to lead to the denominator 8:

1/4 = 2/8.

1/2 = 4/8.

Now all our fractions have the same denominator.

It will be convenient for us to take a unit segment of 8 cells. So, one square will be 1/8, two squares will be 2/8, and so on.

So, 1/4 or 2/8 will be marked in the place of the second square (with a single segment of 8 squares), 3/8 will be marked on the third square, and 1/2 or 4/8 – on the fourth square.