It rounds up to 1000 because 600 is greater than 500
To round to the nearest thousand, the two numbers in their thousands, on either side of 18627 are:18000 which is at a distance of 18627 - 18000 = 627, and19000 which is at a distance of 19000 - 18627 = 373.The smaller of these is 373 and so the nearest 1000 is 19000.
600
0.627 = 627/1000
630
627/1000
600
1000
1000
1000
1000
1000
It is: 500 to the nearest 100 but zero to the nearest 1000