Ms Sia’s Realm of Maths

So, what are significant figures?

Significant figures (s.f.) are digits in a number that tell us, well, precisely how precise a number is. There are many different instruments to help us in our measurements, and the degree of precision of each equipment varies. Thus, having significant figures allow us to know how useful the information we have at hand is: is it precise enough? Do we need more precision?

There are 4 main rules to define significant figures:

Read the rest of this entry »