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