.10
1.0
You take the number before the number you want to round it to. Round to tens: 97112770 (7 is greater then 4, so you round up) round to hundreds: 97112800 (6 is greater then 4 so you round up) round to thousands:97113000 (greater then 4, round up) round to ten thousands: 97113000 (greater then 4, round up) round to hundred thousands: 97100000 (less then 4, round down) round to millions: 97000000 (less then 4 round down) round to billions: 10,000,000 (more then 4 round up)
To round to the nearest whole number, round down to 60. To round to the nearest hundred, round up to 100.
round up
79.642
.10
000-099 = -99
.099 ton
4121
1.0
0.99 = 99/100
3
It is impossible to say without knowing what country you're asking about. There are several countries with a domestic telephone area code 099 or similar.
OV-099
a man named stupid
408