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Significant Figure Rules

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by

Richard Datwyler

on 21 April 2014

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Transcript of Significant Figure Rules

Significant Figure Rules

all about the zero's
zero's that hold places, are not significant

1000
1250
0.00234
zero's between non-zero number are significant
101
150,002
0.00305
2,010
Finally zeros after the decimal point AND non-zero numbers are significant - they show accuracy
101.10
5.800
0.005700
Math with significant figures
multiplications, division (weakest link rule)
whichever number has the least significant figures, will tell you the number of significant figures in the answer.
2.5 x 10025 = 25062.5
answer = 25,000
357452.01 / 261 = 1369.54793
answer = 1370
1024.959 / 82 = 12.4995
answer = 12
addition or subtraction keeps the least accurate measurement.
12.0004
124.057
+ 2.5
138.5574
answer = 138.6
Whole numbers and unit conversions
if you have an equation where a number is used, it is not significant and won't affect the answer.
conversions don't affect the significance either
39.52 in
12 in
1 ft
= 3.2933333
answer = 62.8
answer = 3.293
Full transcript