Number order refers to the arrangement of numbers from smallest to largest (ascending order) or from largest to smallest (descending order).

When arranging numbers in ascending order, you start with the smallest number and place it first, followed by the next smallest number, and so on, until you reach the largest number. For example:

- Arrange the numbers 5, 2, 8, and 3 in ascending order.
- Start with the smallest number, which is 2.
- Next, place 3 after 2.
- Then, place 5 after 3.
- Finally, place 8 after 5.
- The numbers in ascending order are 2, 3, 5, 8.

When arranging numbers in descending order, you start with the largest number and place it first, followed by the next largest number, and so on, until you reach the smallest number. For example:

- Arrange the numbers 10, 7, 12, and 5 in descending order.
- Start with the largest number, which is 12.
- Next, place 10 after 12.
- Then, place 7 after 10.
- Finally, place 5 after 7.
- The numbers in descending order are 12, 10, 7, 5.

Understanding number order is important for comparing numbers and solving mathematical problems.

.Counting and Cardinality

Know number names and the count sequence.

Count to 100 by ones and by tens. [K-CC1]

Count forward beginning from a given number within the known sequence (instead of having to begin at 1). [K-CC2]

Count to tell the number of objects.

Understand the relationship between numbers and quantities; connect counting to cardinality. [K-CC4]

When counting objects, say the number names in the standard order, pairing each object with one and only one number name and each number name with one and only one object. [K-CC4a]

Understand that the last number name said tells the number of objects counted. The number of objects is the same regardless of their arrangement or the order in which they were counted. [K-CC4b]

Understand that each successive number name refers to a quantity that is one larger. [K-CC4c]

Count to answer “how many?” questions about as many as 20 things arranged in a line, a rectangular array, or a circle, or as many as 10 things in a scattered configuration; given a number from 1-20, count out that many objects. [K-CC5]

Compare numbers.

Compare two numbers between 1 and 10 presented as written numerals. [K-CC7]