Reading whole numbers up to and including 100,000 involves understanding the place value system. Each digit in a number represents a specific value based on its position. For example, in the number 45,678, the digit 4 represents 40,000, the digit 5 represents 5,000, the digit 6 represents 600, the digit 7 represents 70, and the digit 8 represents 8.

Representing whole numbers up to 100,000 can be done using various tools and strategies. One common tool is a place value chart, which visually represents the value of each digit in a number. Another tool is base-10 blocks, which are physical manipulatives that help students understand the concept of place value by representing each digit with blocks of different sizes.

Composing whole numbers involves combining smaller numbers to create a larger number. For example, to compose the number 25,000, you can combine 20,000 and 5,000. Decomposing whole numbers is the opposite process, where a larger number is broken down into smaller numbers. For example, to decompose the number 35,000, you can break it down into 30,000 and 5,000.

These skills are used in everyday life in various ways. For instance, when reading a price tag or a phone number, understanding how to read and represent whole numbers is essential. Composing and decomposing numbers are also used when managing finances, such as budgeting or calculating expenses. Additionally, these skills are important in fields like engineering, architecture, and computer science, where precise numerical representations are necessary.