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Chapter 8—Measurements

8-4 Significant Digits

 

 

Rules For Significant Digits

  1. Digits from 1-9 are always significant.

Examples

256 has three significant digits, 256
12.56 has four significant digits, 12.56
  1. Zeros between two other significant digits are always significant

    Examples

205 has three significant digits, 205
0.3008 has four significant digits, 0.3008
30.2 has three significant digits: 30.2
26007 has five significant digits: 26007
  1. Zeros to the right of both the decimal place and another significant digit are significant.

    Examples

2.400  has four significant digits 2.400
0.05300 has four significant digits: 0.05300
  1. Zeros used solely for spacing the decimal point (placeholders) are not significant.

85.004

 

 
  • 0.01566 has five significant digits: 0.01566
  • 0.0004 has one significant digit: 0.0004
  • 0.072 has two significant digits: 0.072

David L. Heiserman, Editor

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All Rights Reserved

Revised: June 06, 2015