#### Answer

$\boxed {6 \times 10^2 + 5 \times 10 ^1+ 8 \times 10^0}$

#### Work Step by Step

$658$ is the same thing as $600 + 50 + 8$, which is $$6 \times 100 + 5 \times 10 + 8 \times 1$$
$100$ is $10^2$, $10$ is $10^1$ and 1 is $10^0$, so the answer is
$$\boxed {6 \times 10^2 + 5 \times 10 ^1+ 8 \times 10^0}$$