94000
1000
600
5229 to the nearest thousandth is simply 5229. There are no decimals to round. But if you meant "thousand", then it is 5000 because the "229" is below the cutoff of "500" (in which case you would round up). If it were 5500 or more, you would round to 6000.
14 million. To specifically answer your question, take the number you want to round it nearest too (such as the nearest hundred, or the nearest thousand) and divide that by half. Anything below half of the number should be rounded down, everything else should be rounded up.
94000
500 000
56000
The number 78500 rounded to the nearest thousand is 79000.
1000
If the thousands are 5 or greater, round up. Four or below, round down. 4,760,000
400
10
200
10
40
90