Answer :

18,366 rounded to the nearest thousand will be 18,000. The reason the number has to be rounded down in this case, is due to the fact that the original number was below 18,500 - had it been 18,500 or higher the number would be rounded up to 19,000.

when rounding a number to the nearest thousand we have to first check the digit in the hundreds place.

if the digit in the hundreds place is equal to or greater than 5 then we increase the value of the thousands place by 1

If the digit in the hundreds place is lesser than 5 then there's no change to the digit in the thousands place

number given is 18 366

digit in the thousands place is 8

digit in the hundreds place is 3. This is lesser than 5 therefore no change is done to the digit in the thousands place. So no change is done to 8.

therefore 18 366 rounded off to the nearest thousand is

18,000