Welcome to our Math lesson on Classes and Placeholders, this is the sixth lesson of our suite of math lessons covering the topic of Numbering Systems, a Historical View, you can find links to the other lessons within this tutorial and access additional Math learning resources below this lesson.
To simplify understanding, numbers are grouped into sets of three digits that start from right to left. These groups are known as classes. Thus, starting from the left we have the simple class, the thousands class, then the millions class, then the billions class and so on. A small space or a comma is often used to separate the classes from each other. The three digits contained in a class are known as placeholders. Thus, for each class we have the placeholder of ones, tens and hundreds. We can see an example of this in the figure below.
The above number can be written as 601 843 279 or 601,843,279 and means 603 million 843 thousands and 279. For example, the placeholder containing the digit 4 shows ten thousands, the placeholder containing the digit 1 shows one millions and so on.
What does the digit 4 indicate in the following numbers?
|Tutorial ID||Math Tutorial Title||Tutorial||Video|
|1.1||Numbering Systems, a Historical View|
|Lesson ID||Math Lesson Title||Lesson||Video|
|1.1.6||Classes and Placeholders|
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