4.99845805 follows the normal rules of rounding. If it is rounded to 1 decimal place, it becomes 5.0.
20.1
7.1 Do not make the mistake of rounding to 7.15 and then 7.2
When rounding 34.789 to 1 decimal place, you look at the digit in the tenths place, which is the 8. Since 8 is greater than or equal to 5, you round up the digit in the ones place, which is the 9. Therefore, 34.789 rounded to 1 decimal place is 34.8.
57.9
Rounding to 1 decimal place (1.d.p) is 1.2Also known as rounding to the nearest hundredth
7.3
It is 4.4
It is: 2.7
4.99845805 follows the normal rules of rounding. If it is rounded to 1 decimal place, it becomes 5.0.
Rounding to the nearest tenth is 19.9Also known as rounding to 1 decimal place (1.d.p)
20.1
4.5 if rounding off to 1 decimal place.
When rounding 3.25 to 1 decimal place, you look at the second decimal place, which is 5. Since 5 is equal to or greater than 5, you round up the first decimal place. Therefore, 3.25 rounded to 1 decimal place is 3.3.
7.1 Do not make the mistake of rounding to 7.15 and then 7.2
"Rounding" a decimal results in fewer decimal places than it started with.300 doesn't have any decimal places to start with, so it can't have anyfewer than that. Rounding never produces more decimal places.
5 minutes is 1/12 of an hour [0.083333...], rounds to 0.1 [one decimal rounding], so it is 2.1 hours, rounded to one decimal place.