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What is the decimal expansion of an irrational number?
A decimal expansion means to write out the base 10 digits of a number. Because irrational numbers do not have a closed form, the decimal expansion will always be an approximation. Consider the irrational number pi, which has the following decimal expansion: 3.14159265... Of course there are more digits to pi than that, which is denoted by the "...". It is sadly impossible to list ALL of the digits of an irrational numbers, since if there were a finite number of digits, you could express it as a fraction, which would not be irrational.
What is 30 and 20 hundredths in decimal form?
30 and 20 hundredths in decimal form is written as 30.20. In this form, the whole number 30 is followed by the decimal point, and the fractional part 20 hundredths is expressed after the decimal point. This represents the number 30.20 in decimal form.
What is the decimal for of 30?
A decimal number is simply a way of representing a number in such a way that the place value of each digit is ten times that of the digit to its right. A decimal representation does not require a decimal point. So the required decimal representation is 30, exactly as in the question.
What is decimal expansion?
It is expressing a number in decimal form: that is, a form in which the place value of each digit is one tenth the place value of the digit to its left.
How do you turn 30 into a decimal?
Do nothing. 30 is in decimal form, though if you must, you can rewrite it as "30." 30.0 indicates a higher number of significant digits and so is not appropriate to use it.
