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We can write the whole number 159 in expanded form as follows: 159 = (1 x 100) + (5 x 10) + (9 x 1). Decimals can also be written in expanded form. Expanded form is a way to write numbers by showing the value of each digit.This is shown in the example below.Example 4: Write each decimal in expanded form.e can write the whole number 159 in expanded form as follows: 159 = (1 x 100) + (5 x 10) + (9 x 1). Decimals can also be written in expanded form. Expanded form is a way to write numbers by showing the value of each digit. This is shown in the example below. Example 4: Write each decimal in expanded form.
The decimal expansion of a number is its representation in base 10 (i.e., the decimal system). For example, the decimal expansion of 25 is 625, of pi is 3.14159..., and of is 0.1111.... The decimal expansion of a number can be found in Mathematica using the command RealDigits[n], or equivalently, RealDigits[n, 10].