## Prealgebra (7th Edition)

In standard form, each 3 digits from the left is a period. $quadrillions\ \ \ \ \ \ billions\ \ \ \ \ thousands$ $\ \ \ \ \ \ \ \ \ \ \ \ \ \ \overbrace{1},\underbrace{000},\overbrace{000},\underbrace{000},\overbrace{000},\underbrace{000}$ $\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ trillions\ \ \ \ millions\ \ \ \ \ ones$