# How do you round 100.1°C to 1 significant figure?

Aug 26, 2016

$100$ has one significant figure.

#### Explanation:

As the number is given, it has 4 significant figures.

The zero's are part of the number, they are not just place holders making the number 10 times bigger or smaller.

$100.1$ has 4 significant figures in the same way that $135.1$would.

$100$ has 1 significant figure

In this case, 2 and 3 significant figures would also be 100