You write it as 217000, exactly as in the question.
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. Adding zeros after the decimal point is wrong because they imply a degree of accuracy (significant figures) for which there is no justification.
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To write 9.75 as a decimal, you simply write the whole number part followed by a decimal point and then the decimal part. Therefore, 9.75 can be written as 9.75 in decimal form.
To write nine tenths as a decimal, it looks like this: .9
To write 130 as a decimal, you simply write it as 130.0 or 130.00. This indicates that there are no additional decimal places beyond the whole number 130. Another way to represent 130 as a decimal is to write it as 130.000, which emphasizes that there are no decimal values present.
blank = representation.
2.18 is a decimal.