Assuming you mean $1.389, you would round to two decimal places, as there are 100 cents in a dollar, and two decimal places is the hundredth place. 9 is greater than 5, so this number rounds to 1.39.
435.38
If that's 325 cents, it's 325 If that's 325 dollars, it's 325.00 If that's 3.25, it's already there.
236.6
6790
83333
18.2
400
10.0
55
6.70
200
It is: 58.1