"Rounding" means, in this case, find the nearest multiple of 10. The problem here is that it's just as close to 150 as to 160. Computers will usually round this UP (i.e., to 160), but there are other sets of rules, which are sometimes used, which would sometimes round such numbers UP, sometimes DOWN (in an effort to reduce statistical bias, by rounding more numbers up than down). When a number is exactly in the middle, as in this case, it really depends which sets of rules are supposed to be used.
160
It is 160 when rounded to the nearest ten
It is 160 to the nearest ten.
It is 160.
To the nearest ten, 160 To the nearest hundred, 200
It rounds to 160
200
It is already rounded to a whole number as 155
155 is 15500 percent
60
It is then 740 when rounded to the nearest ten.
30
36,184 rounded to the nearest ten thousands place is 40,000.
2602 rounded to the nearest ten is 2600.
320
20