It trains your brain for bigger math – When you grow up, you’ll see numbers broken apart in different ways: for estimating, doing mental math, or even spreadsheets and data stuff. …

Expanded form Expanded form is a way to write a number by adding the value of its digits. We can use a place value chart to think of the value of a number's digits.

To write a decimal in expanded form, we need to break down each digit according to its place value. Start with the whole number portion, identifying the hundreds, tens, and ones places.

This video demonstrates converting large numbers from expanded and written form to standard form. Using the example "six hundred forty-five million five hundred eighty-four thousand four …

Sal shows how to turn numbers from expanded form to number form. Created by Sal Khan.

In this video, we're going to think about going from a number written in words to expanded form. So let's look at an example. Let's say I were to write the following, and I'm not even going to …

Practice reading and writing numbers written in expanded form.

Expanded form Expanded form is a way to write numbers by adding the value of its digits. We can use a place value chart to think of the value of a number's digit.

Sal shows how to turn a number from number form into word form. Created by Sal Khan.

Practice writing numbers in different forms, including expanded, word and number form.