1, to ensure the length of each line is equal: you draw a short line first, copy it for 9 times, and the *** 10 segments with the same length form a straight line;

2. Reflect equal division: Set the action path of these line segments, which will become a column after moving, so that you can intuitively see that the length of each line segment is the same.

About this topic: More than this example, this is a concept class with average score or cognitive score or unit "1".