Question

Out of the following options what would be the best estimate for $590-210$ by rounding to the nearest hundreds?

• A. $400$
• B. $300$
• C. $500$

Answer 1

The correct option is A $400$

To tackle this problem we round off the indiviual numbers first.

Concept: For rounding off a number to nearest hundred, we need to look at tens place value.

If tens place value is greater than 5, we round up the number.

If tens place value is less than or equal to 5, we round down the number.

$590$ can be rounded up to $600$


and $210$ can be rounded down to $200$.



So, let us estimate the difference:

$600-200=400$

And the real result would be $590-210=380$ which is close to our estimation. So we can say $400$ is a good estimation.