1 Significant Digits Reflect the accuracy of the measurement and the precision of the measuring device. All the figures known with certainty plus one extra. - ppt download
significant digits ~ A Maths Dictionary for Kids Quick Reference by Jenny Eather
How to round numbers using significant figures - BBC Bitesize
Significant Figures Worksheets | Practice Questions and Answers | Cazoomy
Significant Figures and Scientific Notation – Study Material for IIT JEE | askIITians.
How to round numbers using significant figures - BBC Bitesize