what are the rules of the significant figures round off
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Rule # 1: If the digit to be dropped is greater than 5, then add "1" to the last digit to be retained and drop all digits farther to the right. For example: 3.677 is rounded off to 3.68 if we need three significant figures in measurement.
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The rules of significant figure round off are:-
1) all non-zero digits are significant.
2) zeros preceding to first non zero digits are not significant.
3) zeros between two non zero digits are significant.
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