Question

Estimate the sum by rounding off the number to the nearest hundreds:$207+391$

Answer 1

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

• As $207$ lies between $200$ and $300$

Since $207$ is nearest to $200$ than to $300$.

Therefore $207$ rounded off to the nearest hundred as $200$.

• Also $391$ lies between $300$ and $400$

Since $391$ is nearest to $400$ than to $300$.

Therefore $391$ rounded off to the nearest hundred as $400$.

Step 2.Find sum

$200+400=600$

Hence the sum by rounding off the number $207+391$ to the nearest hundreds is $600$