Difference between revisions of "Significant Figure"
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==Key Stage 4== | ==Key Stage 4== | ||
===Meaning=== | ===Meaning=== | ||
| − | [[Significant Figures]] are the number of digits | + | [[Significant Figures]] are the number of digits representing the [[accurate]] value of a [[number]]. |
===About Significant Figures=== | ===About Significant Figures=== | ||
: [[Significant Figures]] begin with the digit representing the largest number. | : [[Significant Figures]] begin with the digit representing the largest number. | ||
| − | : A number may be | + | : A number may be correct to a given number of [[Significant Figures|significant figures]]. |
| − | : The number of [[Significant Figures|significant figures]] is related to how [[ | + | : The number of [[Significant Figures|significant figures]] is related to how [[resolution]] of a [[Measuring Instrument|measuring instrument]]. |
: When performing a [[calculation]] the answer should never be given to more [[Significant Figures|significant figures]] than the numbers used in the [[calculation]]. | : When performing a [[calculation]] the answer should never be given to more [[Significant Figures|significant figures]] than the numbers used in the [[calculation]]. | ||
Revision as of 09:21, 25 March 2019
Key Stage 4
Meaning
Significant Figures are the number of digits representing the accurate value of a number.
About Significant Figures
- Significant Figures begin with the digit representing the largest number.
- A number may be correct to a given number of significant figures.
- The number of significant figures is related to how resolution of a measuring instrument.
- When performing a calculation the answer should never be given to more significant figures than the numbers used in the calculation.
Examples
π = 3.14159265359 correct to 12 significant figures. π = 3.142 correct to 4 significant figures.
The diameter of Earth = 12,742,000m correct to 5 significant figures. The diameter of Earth = 12,700,000m correct to 3 significant figures. The diameter of Earth = 10,000,000m correct to 1 significant figures.