Definitions -

Standard Form - 42.65

Word Form - Forty two and sixty five hundredths

Expanded Form -

Writing a number to show the value of each digit.

It is shown by stretching the decimal based on it's place value.

For example,

42.65 = 40 +2 + .6 + .05

43.65 = 40 + 2 + 6/10 + 5/100

Expanded Notation -

Writing a number to show the value of each digit.

It is shown as a sum of each digit multiplied by its matching place value (units, tens, hundreds, etc.)

For example:

42.65 = (4x10) + (2x1) + (6x.1) + (5 x .01)

42.65 = (4x10) + (2x1) + (6 x 1/10) + (5 x 1/100)