The significant figures of a number are those digits that carry meaning contributing to its precision. This includes all digits except: Significance arithmetic are approximate rules for roughly maintaining significance throughout a computation. The more sophisticated scientific rules are known as propagation of uncertainty. Numbers are often round...
Found on
http://en.wikipedia.org/wiki/Significant_figures
If you measure one side of a cube with a ruler marked in cm and find it is 26 cm long, then its volume should be 17576 cm3, right? Wrong! You have only put two meaningful digits into your calculation - the cube could be anywhere from about 25.50001 to 26.49999 cm long on a side, and if you say it has a volume of 17576 cm3 you are claiming accuracy ...
Found on
http://www.encyclo.co.uk/local/20046
Figures in a number that, by virtue of their position, express the magnitude of that number to a specified degree of accuracy. In a number, the first significant figure is the first figure that is not a 0. The final significant figure is rounded up if the following digit is greater than 5. For example, 5,463,254 to three significant figures is 5,46...
Found on
https://www.encyclo.co.uk/local/21221
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