Well, when your rounding by ones, if the ones place is lower than 5, round lower. Like for example, 4 is lower than 5. So if you have 5,784, you have to round that 4 down to a 0. So it would be 5,780.
if it's higher that 5, like 7, you round up. Like for example, 507, you round it to 10, so 510.
