Significant Figures

5. Round off 0.000275 to two significant figures. Answer: 0.000275 is between 0.00027 and 0.00028. Since it is equally close to both these numbers, then it will be rounded off to the nearest even number. Round off upward to 0.00028 Problems: Rounding-off numbers Round off each of the following numbers to three significant figures. ................
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