# How do you round 0.000718 kilograms to two significant figures?

$\textcolor{b l u e}{0.000} \textcolor{red}{72}$ kg has 2 significant figures
The number $\textcolor{b l u e}{0.000} \textcolor{red}{718}$ has 3 significant figures as shown in red. The blue zero's are place holders showing how big or small the number is.
$\textcolor{b l u e}{0.000} \textcolor{red}{72}$ kg has 2 significant figures - the 8 makes the 1 round up to 2.