Place Value
the place or position  in a number number
        1  unit
     10 ten
           100 hundred
         1,000 thousand
              10,000 ten thousand
                     100,000 hundred thousand
  1,000,000 million

5,687,453
5 Million, 6 Hundred and 87 Thousand, 4 Hundred and 53
,
Millions, Hundred Thousands, Ten Thousands, Thousands, Hundreds,Tens,Units

http://www.linkslearning.org/Kids/1_Math/2_Illustrated_Lessons/3_Place_Value/index.html

http://www.schoolexpress.com/fws/cat.php?id=2308

http://www.themathpage.com/arith/powers-of-10-2.htm

http://www.mathsisfun.com/definitions/place-value.html