Question

Match the differences with their closest estimations by rounding to nearest hundreds.

• A. $300$
• B. $400$
• C. $200$

Answer 1

To find out estimations we round off the indiviual terms and then calculate the differences.

In $278-109$, 278 will be rounded up to 300 because tens place digit of 278 i.e. 7 is greater than 5.

109 will be rounded down to 100 because its tens place digit is less than 5.

Hence, difference of the estimated numbers is $300-100=200$

Similiarly,
$893-578$ will be rounded off to $900-600=300$

and, $540-98$ will be rounded off to $500-100=400$