Significant and Estimated Digits
• In any measurements, the number of significant digits is the number of digits believed to be correct.
• It includes one estimated digit. A rule of thumbread 1/10 of the smallest division
for base-10 numeral system.
• e.g.Isthevolumeinthisbeaker
47 mL, 48 mL or 49 mL?
All the answers are correct within the reading error 1mL. We know the “4” for sure, but the trailing have to be estimated.