1000
2000
1678 to the nearest 1000 would be 2000. This is because 1678 is closer to 2000 than it is to 1000. When rounding to the nearest 1000, you look at the hundreds place - in this case, the hundreds place is 6, which is closer to 10 (in 2000) than to 0 (in 1000).
2000
2000
1000
2000
2000
2000
2000.
2000
2000