Question

4*10^-1+9*10^-2+1*10^-4

Answer 1

$displaystyle 4*10^{-1}+9*10^{-2}+1*10^{-4}= frac{4}{10}+frac{9}{100} +frac{1}{10000}=frac{4000+900+1}{10000}$
$displaystyle = frac{4901}{10000}=0,4901$