What Are the Common Rules When Adding Significant Figures?

Nancy R. Cohen/Stockbyte/Getty Images

When adding numbers, the rules of significant figures dictate that the sum should be rounded to the same place as the least significant place of the number, with the least number of places after the decimal point. Significant figures are important when recording and relaying scientific data because they provide the reader with an idea of how best one can report/measure data.

ADVERTISEMENT