When rounding 689 to the nearest hundreds place, you look at the digit in the tens place, which is 8. Since 8 is greater than or equal to 5, you round up the hundreds place digit by 1. Therefore, 689 rounded to the nearest hundreds is 700.
690
80,000 is already rounded to the nearest hundreds.
500
0
0
3571000
2600
6600
3600
4300
4800
1400