Question

Estimate the product to the nearest hundreds :
$98\times 92$

• A. $8100$
• B. $9000$
• C. $10000$
• D. $1000$

Answer 1

The correct option is B $9000$

$\Rightarrow$ In number $98$, its unit digit is $8$, which is greater than $5$.

$\Rightarrow$ So, we increase the digits at tens place by 1 and replace ones place by 0. Round of is $100$.

$\Rightarrow$ In number $92$, its unit digit is $2$, which is less than $5$.

$\Rightarrow$ So, we replace ones digits by 0 and keep the other digits as they are to round off. The round of number is $90$

$\Rightarrow$ $98\times 92=100\times 90=9000$.