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Steve
EzraThe question is not using the terms correctly. A number is rounded to N significant places, N being a variable. So you would round to 2 significant figures, or 4, 5, or whatever was appropriate. Good explanatins and examples are to found from the links below,
If you are asking whether to round up or down, in pre-computer days, it was usual to round down between .0 and .49, and to round up from .5 to .99. With the advent of spreadsheets, it is more dependent on the programming. Some round up, some round down. Some round up half the time and down the other half. Some randomly round up or down.
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measured value 28.7053cm which has six significant figures round the measurement to four significant figures?
28.71
645533 round to three significant figure?
For doing significant figure you down count from the start the required amount, so 645533 would become 646000.
Round 2789.01 to 2 significant figures?
2700
How do you change 3.20 into 2 significant figures?
To change 3.20 into 2 significant figures, simply round it to 3.2. The zero after the 2 is removed as it is not significant when there are only 2 significant figures.
Round the number 23435.6 to 2 significant figures?
Five, two and five sig figs respectively.
