I also need the rules and techniques to round off numerical values.

Asked by Laiba Khan | 22nd Apr, 2013, 03:15: PM

Expert Answer:

A number is rounded off to the desired number of significant figures by dropping one or more digits from the right. When the first digit dropped is less than 5, the last digit retained should remain unchanged; when it is greater than 5, the last digit is rounded up. When the digit dropped is exactly 5, the number retained is rounded up or down to get an even number. When more than one digit is dropped, rounding off should be done in a block, not one digit at a time.

Rounding significant figures involve 2 rules to remember:
 
Rule One: See what is our rounding digit is asked to do and see the right side of number of digits the rounding of significant figures asked for. If that digit are less than 5, simply leave all digits to the right of it.
 
Rule Two: See what is our rounding digit is asked to do then see what the right side of number of digits the rounding of significant figures asked for. If that digit is 5 or greater than 5, add one to the rounding digit and drop all digits to the right of it.

Answered by  | 22nd Apr, 2013, 03:41: PM

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