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What is the purpose for leaving decimal values at the end of a number? The may give additional precision or may be indicators of the number of significant digits in the calculation. As an example of the latter, 5.000 kilometres is, at first sig â¦ ht, no different from 5 km.
So, our Decimal System lets us write numbers as large or as small as we want, using the decimal point. Digits can be placed to the left or right of a decimal point, to show values greater than one or less than one. The decimal point is the most important part of a Decimal Number. Without it we are lost, and don't know what each position means.