Question

Estimate the following products using general rule:

$578\times 161$

Answer 1

$578\times 161$

On rounding off by general rule

$578$ rounded off to $600$

$161$ rounded off to $200$ respectively

$$\begin{gathered} 578\times 616 \\ 600\times 200 \\ 120000 \end{gathered}$$

Hence, $578\times 161$ is $120000$