Q: What is 12.09 rounding to 1 decimal place?

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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

57.9

It depends what number you're rounding to. (dp=decimal place) 0.7234 (4dp) 0.723 (3dp) 0.72 (2dp) 0.7 (1dp) 1 (1sf (significant figure))

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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.

No rounding is necessary - the number is already rounded to one decimal place.

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.