Question

Rohit's teacher asked him to tell the correct answer after performing the steps given.
$\bullet$ Round off $43,98$ and $250$ to nearest tens.
$\bullet$ After rounding off, add them.
$\bullet$ Round off the sum to the nearest hundreds.
Then, the correct answer is __________.

• A. $300$
• B. $400$
• C. $350$
• D. $480$

Answer 1

The correct option is B $400$

Rounding off to nearest tens:

If unit digit is $0,1,2,3,4$ then round down to nearest tens.

If unit digit is $5,6,7,8,9$ then, round up to nearest tens.

$43$ $\to$ $40$

$98$ $\to$ $100$

$250$ $\to$ $250$

$40+100+250$ $\to$ $390$

$390$ $\to$ $400$

Hence, Option B is correct.