Standard Form
The digits, with a decimal point after the ones.
Word Form
five hundred seven and
three hundred eighteen thousandths
Read the decimal point as "and".
Expanded Form
500 + 7
+ 0.3 + 0.01 + 0.008
The digits' values written as a sum. The 0 in the tens place adds nothing.
Expanded Notation
(5 × 100) + (7 × 1)
+ (3 × 0.1) + (1 × 0.01) + (8 × 0.001)
Each digit × its place value. This form shows what every digit is worth.
