Question

Estimate the sum by rounding off the number to the nearest hundreds:$509+89$

Answer 1

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

• As $509$ lies between $500$ and $600$

Since $509$ is nearest to $500$ than to $600$.

Therefore $509$ rounded off to the nearest hundred as $500$.

• The nearest hundred of $89$ is $100$

Therefore $89$ rounded off to the nearest hundred as $100$.

Step 2.Find sum

$500+100=600$

Hence the sum by rounding off the number $509+89$ to the nearest hundreds is $600$