Question

After rounding off $64+25$ to nearest $10$ , we get:

• A. $89$
• B. $90$
• C. $85$
• D. $80$

Answer 1

The correct option is B $90$

If we round off $64$ , we get $60$ as the ones unit, $4$ < $5$ .
$64$ is more nearer to $60$ as compared to $70$.

$25$ is at equal distance from $20$ and $30$.
As ones digit = $5$ , by convention, we round off $25$ to $30$ .

Adding, $60+30=90$