27.0
The nearest hundred above 55 is 100. The nearest hundred below 55 is 0.
256 to the nearest 100 is 300, because this is the number it is closer to. HTU 256 Look at the tens (T), if this number is 5 or over the hundreds column (H) is rounded up, in this case to 3(00). If it is 4 or under it is rounded down to 2(00).
2.98 rounded to 1 decimal place
12oC
I.83 is already rounded to the nearest hundredth
65.278 rounded to the nearest tenths place is 65.3
2540
29.1
9.5
543 rounded to the nearest tens place is 540.
120
6.9 rounds to 7.
It is already a whole number as 1220
237000
27.0
800