The fifth subproblem is the point represented by a fraction on a straight line, which should be represented by a straight line.

5. Which of the following scores can be expressed by the same point on a straight line? Arrange them in a straight line.

Solution: There are 0, 1 and 2 on the straight line, so 12/6 should be written on the right between 2 and 1, and 8/ 10 is also this. According to the basic properties of the fraction, 12/3 should be written in the middle of 0 to 1, which has nothing else but * *.