Well, isn't that a happy little question! When we round 1455 to the nearest 1000, we look at the hundreds place, which is 5. Since 5 is less than 500, we round down to 1000. So, 1455 rounded to the nearest 1000 is 1000. Just like painting, sometimes we need to simplify things to see the bigger picture!
1000
1,455 to the nearest thousands is 1,000.
1460
1500
1000
1000
1000
1000
176 rounded to the nearest 1000 is 0
1000
0
1000