When rounding 142 to the nearest hundred, you look at the digit in the tens place, which is 4. Since 4 is less than 5, you round down. Therefore, 142 rounded to the nearest hundred is 100.
142 rounded to the nearest hundred is 100.
80,000 is already rounded to the nearest hundreds.
500
0
0
3571000
2600
6600
3600
4300
4800
1400