List all the elements of the following set. Use set notation and the listing method to describe the set. The set of all counting numbers less than or equal to 2 . Express the set using set notation and the listing method. (Use a comma to separate answers as needed. Use ascending order.)

The set of all counting numbers less than or equal to 2 can be expressed in set notation as: {1, 2}. Counting numbers, also known as natural numbers, start from 1 and include all positive integers. Since we are looking for numbers less than or equal to 2, we only list the first two counting numbers!