Science Help Online Worksheet 2-3a Number of Significant Digits

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Remember These Rules:

  1. Digits from 1-9 are always significant.
  2. Zeros between two other significant digits are always significant
  3. One or more additional zeros to the right of both the decimal place and another significant digit are significant.
  4. Zeros used solely for spacing the decimal point (placeholders) are not significant.

         Identify the number of significant digits show in each of the following examples.

1)   400

 

 

 

 

2)    200.0 3)    0.0001 4)    218
5)  320

 

 

 

 

6)    0.00530 7)    22 568 8) 4755.50 
Answers:   1) 1      2) 4     3) 1     4) 3      5) 2     6) 3     7) 5      8) 6                                                                           

Please forward all questions, comments and criticisms to Gregory L. Curran.
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Last Modified May 22, 2004