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# Significant Figures: In Calculations

See all sections
Sections
Classification of Matter
Physical & Chemical Changes
Chemical Properties
Physical Properties
Intensive vs. Extensive Properties
Temperature
Scientific Notation
SI Units
Metric Prefixes
Significant Figures
Significant Figures: Precision in Measurements
Significant Figures: In Calculations
Conversion Factors
Dimensional Analysis
Density
Density of Geometric Objects
Density of Non-Geometric Objects

Significant Figures are often involved in chemical calculations.

###### Significant Figures In Calculations

Concept #1: Significant Figure Rules with Multiplication and Division.

Concept #2: Significant Figure Rules with Addition and Subtraction.

Concept #3: Significant Figure Rules with Mixed Operations.

Practice: Perform the following calculation to the right number of sig figs:
[(1.7 × 106) ÷ (2.63 × 105)] + 6.96

Practice: Perform the following mathematical operations and express the result to the correct number of significant figures.
(6.404 × 2.91) / (18.7 – 17.1)

Practice: What answer should be reported, with the correct number of significant figures, for the following calculation?
[(42.00 − 40.914) ⋅ (25.739 − 25.729)] / [(11.50⋅1.001) + (0.00710 ⋅ 700.)]