Question

What is the smallest possible number that will round DOWN to 2,300,000 when rounding to the nearest 100,000.

Answer 1

We will discuss here about rounding large numbers.

Rounding off to the nearest ten thousand (10,000):

If the digit in the thousand’s place in a number is 0, 1, 2, 3 or 4 then round to the nearest multiple of ten thousand which is smaller than the given number.

If the digit in the thousand’s place in a number is 5, 6, 7, 8 or 9 then round to the nearest multiple of ten thousand which is greater than the given number.

Thus, to round off numbers to the nearest ten thousand look at the digit in the one thousands place.

For example, round the following numbers to the nearest ten thousand

T. Th Th H T O

4 6 2 7 9 → 50000

8 0 1 5 3 → 80000

6 5 0 0 0 → 70000

9 6 2 5 1 → 100000

8 3 1 0 1 → 80000