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January 24, 2015

January 24, 2015

Posted by **Jailyn** on Tuesday, September 20, 2011 at 7:39pm.

- Math -
**Steve**, Wednesday, September 21, 2011 at 12:28pmThe error can be expressed as units, or as percentage.

Say you have a somewhat accurate ruler, and you measure a board. You find a length of 3m, but the lines on the ruler are rather blurred, so there's a chance of a 2mm error either way.

So, the actual length could be anywhere from 2.998m to 3.002m.

Or, if you're using an electronic device, maybe its specs say that it's accurate to 1%.

In this case, 1% of 3m = 3cm, so the real length could be from 2.97m to 3.03m.

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