In increasing numbers or declining orders children will learn to arrange numbers from the largest to the smallest and also from the smallest to the largest.
Order increases:
When numbers range from the smallest to the largest, those numbers are said to be increasing.
For example:
Arrange the numbers in ascending order from 5 to 11.
5, 6, 7, 8, 9, 10, 11
Order drop:
When numbers are listed from the largest to the smallest, those numbers are said to be reversible.
For example:
Arrange the numbers by descending from 23 to 17.
23, 22, 21, 20, 19, 18, 17