Theory:

Numbers can be expressed in three forms. They are as follows:
  1. Standard form
  2. Expanded form
  3. Written form
Standard form: The standard form is nothing but the mathematical form of the number.
Example:
The number \(425\) - Standard form.
 
Similarly, \(8756, 369824, 587469123\) are also the standard forms of numbers
Expanded form: Split a number according to their place value and expand it to show the value of each digit is called the expanded form.
Example:
For the same set of numbers \(425, 8756, 369824, 587469123\), the expanded form will be as follows:
 
exp_f.png
Written form: This can be done by directly converting the expanded form to words.
Example:
For the same set of numbers \(425, 8756, 369824, 587469123\), all the three forms are listed below.
 
Standard form
Expanded form
Written form (Indian system)
Written form (International system)
\(425\)\(400+20+5\)Four Hundred Twenty-FiveFour Hundred Twenty-Five
\(8756\)\(8000+700+50+6\)Eight Thousand Seven Hundred Fifty-SixEight Thousand Seven Hundred Fifty-Six
\(369024\)\(300000+60000+9000+20+4\)Three Lakh Sixty Nine Thousand Twenty FourThree Hundred Sixty Nine Thousand Twenty Four
\(587469123\)
\(500000000+80000000+7000000+\)
\(400000+60000+9000+100+20+3\)
Fifty-Eight Crore Seventy Four Lakh Sixty Nine Thousand One Hundred Twenty ThreeFive Hundred Eight Seven Million Four Sixty Nine Thousand One Hundred Twenty Three