Question

Estimate the following result:

$39x311$.

Answer 1

Step 1. Rounding off the numbers to the nearest hundred.

• As $39$ lies between $30$ and $40$

Since $39$ is nearest to $40$ than to $30$.

Therefore $39$ rounded off to the nearest tens as $40$.

• Also $311$ lies between $300$ and $400$

Since $311$ is nearest to $300$ than to $400$.

Therefore $311$ rounded off to the nearest hundred as $300$.

Step 2.Simplify

$40x300=12000$

Hence estimate value of $39x311$ is $12000$