## Reading and Writing Numbers

Now that you understand place and value, you can read and write numbers! You will use what you know about place and value to read and write numbers in three different ways:

**STANDARD FORM**

WORD FORM

EXPANDED FORM

WORD FORM

EXPANDED FORM

## Standard Form

STANDARD FORM (or Standard Notation) is probably the way you write numbers most of the time. When writing a number in STANDARD FORM, you use digits 0-9. Remember, when writing numbers in standard form, a comma is used to seperate each group of three digits. The following numbers are in STANDARD FORM:

86

35,827

439

320,064

35,827

439

320,064

## WORD FORM

When you read a number aloud or write a number using letters, this is called WORD FORM. Knowing the PLACE of the digits within a number will help you read or write numbers in WORD FORM. When you see the comma between the thousand and hundreds place within a number, this tells you to say the word

*thousand*. Notice how the following numbers are written in WORD FORM:**86:**Eighty-six

**35,827:**Thirty five thousand, Eight hundred twenty-seven

**409:**Four hundred, nine

**302,064:**Three hundred two thousand, sixty-four

## Expanded Form

The last way to write numbers is called EXPANDED FORM. When writing numbers in EXPANDED FORM, write the number as a SUM of each digit's value. Take a look at the numbers written in EXPANDED FORM:

86 =

35,827 =

**80 + 6**35,827 =

**30,000 + 5,000 + 800 + 20 + 7**

409 =**400 + 9**

302,064 =**300,000 + 2,000 + 60 + 4**

Watch the following video to see different numbers written in STANDARD FORM, WORD FORM, and EXPANDED FORM:

By: lisalitch, http://www.teachertube.com/viewVideo.php?video_id=58200

## practice makes perfect!

Check out these fun games to practice reading and writing numbers!

Expanded Form Hangman

IXL: Convert Between Standard and Expanded Form

Expanded Form Hangman

IXL: Convert Between Standard and Expanded Form

## STOP! QUick Check!

Before moving on to "Comparing and Ordering Numbers," please complete the following Quick Check.

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