round to the nearest tenth?

Answer 1

The standard algorithm is to add 5 of the next smaller order of magnitude and then truncate.
For example: to round 3.1622 to the nearest tenth; one would add 0.05, get 3.2122 and truncate to get 3.2
For example: to round 3.1415 to the nearest tenth; one would add 0.05, get 3.1915 and truncate to get 3.1
There is another algorithm used in certain statistical analysis techniques which attenuates some probabilistic artifacts.

Answer 2

It means that you need to round up to the tenth.

For example, I will take 3.14159
because the hundredth (4) is smaller than 5, I will not ad a tenth, meaning rounding 3.14159 to the nearest tenth would be: 3.1

the number 9.559 would be 9.6, because the hundredth (5) is larger or equal to 5.

I hope that answers your question^^

Answer 3

That just means the nearest first spot past the decimal.

EX. 1.25443 would be 1.3 cause the 5 in the hundredths spot makes the 2 a three.

2.123 is 2.1 cause the 2 in the hundredths spot makes the 1 stay a 1