To round 10164 to the nearest 1000, we look at the hundreds place, which is 1 in this case. Since the digit in the hundreds place is less than 5, we keep the thousands place (10) the same and change all digits to the right to zero. Therefore, 10164 rounded to the nearest 1000 is 10000.
1000
1000
921 rounded to the nearest ten thousand is 0. Rounded to the nearest thousand is 1000.
1000
1000
1000
1000
1000
176 rounded to the nearest 1000 is 0
1000
0
214357000
128000
921 rounded to the nearest ten thousand is 0. Rounded to the nearest thousand is 1000.
1000
1000
1000