Question

Estimate for $79080-23410$ by rounding to nearest ten thousand.

• A. $50000$
• B. $60000$
• C. $70000$

Answer 1

The correct option is B $60000$

To round a number to nearest ten thousand, we have to look at the digit at the thousands place.
In 79080, thousand place value i.e. 9 is greater than 5 so, we can round it up to 80000.
On the number line, we can see 79080 is closer to 80000 than 70000.



Similary, in 23410, thousand place value i.e. 3 is less than 5 so, we can round it down to 20000.
On the number line, we can see 23410 is closer to 20000 than 30000.


Now calculating our rounded off numbers we have $80000-20000=60000$.
Checking it with the exact amount $79080-23410=55670$ we can say that we have made a pretty good estimate.