Question

Estimate the following sums by rounding off the numbers to their nearest thousands and compare the result with the actual sum.

e) $8,650+26,181$

Answer 1

To round off the digit to the nearest thousand, only hundred digit we have to see, if the hundred digit is more then $5$,then in the thousand digit one is added and other place value digit is change to zero. And if the value is less then $5$, then the thousand digit remain same and other place value will change to zero.

So,$8,650$ is written as $9,000$.

$26,181$ is written as $26,000$.

Sum of the round off thousand $$\begin{gathered} =9,000+26,000 \\ =35,000 \end{gathered}$$

Actual sum $$\begin{gathered} =8,650+26,181 \\ =34,831 \end{gathered}$$

Round off actual sum is $35,000$.

Both the result is same.