Now that we have emphasized the units we will be using, we need to come up with a system that will indicate to us, and more importantly, someone else who is reading our data, just how good our measurement is. Significant Figures tell us how good our data is.
1.5 Significant Figures
Once the rules for significant figures have been established for individual numbers, we then need to determine a set of rules allowing us to determine significant figures in calculations. The following video shows the significant figure rules for problems involving addition/subtraction and multiplication/division.
1.5 Significant Figures in Calculations