To round to the nearest thousands, look at the digit to the right of the thousands digit (the hundreds digit) and if it is greater than or equal to 5 round up, otherwise it is less than5 and round down.
The hundreds digit of 4862 is 8 which is greater than or equal to 5, so round up.
Thus 4862 → 5000 to the nearest thousand.
It is: 5000
1000
1000
1000
1000
176 rounded to the nearest 1000 is 0
1000
0
1000
214357000
128000
921 rounded to the nearest ten thousand is 0. Rounded to the nearest thousand is 1000.