Significant Digits in Calculations

1
Significant Digits in Calculations
2
Calculation rules

• Never consider EXACT numbers when determining
  SDs. Remember, no measurement is exact.
• In multiplication and division, look for the
  measurement with the least number of SDs. That
  is how many SDs should be in your final answer.
• In addition and subtraction, look for the
  measurement that has the smallest total places
  behind the decimal. This is how many places
  behind the decimal that your answer should have.