Calculation with Significant Figures

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Presentation transcript:

Calculation with Significant Figures

101. + 23.643 124.643 125 (accurate to ones place) 0.24 g/mL General rule: The accuracy of answer is limited by the least accurate measurement involved in the calculation. Rounding : 50/50 If 1st digit to be dropped is: < 5 Round number to be rounded DOWN > 5 Round number to be rounded UP = 5 Round number to be rounded so it will be EVEN Addition And Subtraction Round answer to least number of decimal places (least accurate measurement). 101. + 23.643 124.643 125 (accurate to ones place) Multiplication And Division Round answer to least number of significant digits found in measurements. 3.0 g / 12.60 mL = 0.238095238 g/mL 0.24 g/mL

(2.8 x 4.467) + 12.854 = ? Mixed Operations Follow PEMDAS Apply Sig Fig rule once operation has been performed. (2.8 x 4.467) + 12.854 = ?