Rounding numbers...

[gopunk]

i've noticed that a lot of people don't really do it properly... or at least not the same way as me

for example if you had 2.546, i would round that to 2.6 where other people would round that 2.5

i always thought you are supposed to round the 4 to a 5 because of the 6, then the 5 to a 6 because of the other 5.

 

[aphex]

Originally posted by: gopunk
i've noticed that a lot of people don't really do it properly... or at least not the same way as me

for example if you had 2.546, i would round that to 2.6 where other people would round that 2.5

i always thought you are supposed to round the 4 to a 5 because of the 6, then the 5 to a 6 because of the other 5.

It really depends what the context is... Mathmatically, yes you should round up on anything .5 and above, but if you speaking in terms of things in which rounding down would cause problems, even a .1 should be rounded up...

 

[gopunk]

Originally posted by: aphexII

Originally posted by: gopunk
i've noticed that a lot of people don't really do it properly... or at least not the same way as me

for example if you had 2.546, i would round that to 2.6 where other people would round that 2.5

i always thought you are supposed to round the 4 to a 5 because of the 6, then the 5 to a 6 because of the other 5.

It really depends what the context is... Mathmatically, yes you should round up on anything .5 and above, but if you speaking in terms of things in which rounding down would cause problems, even a .1 should be rounded up...

hmm, i don't think the discrepancy is because of that (though i'm sure that comes up)... it just seems like people aren't paying attention to the 6, they think the 4 is all they need to know.

 

[tcsenter]

for example if you had 2.546, i would round that to 2.6 where other people would round that 2.5

I would round that to 2.55.

If I HAD to go one place after the decimal, it is 'supposed' to be rounded down to 2.5. So it is you that doesn't do it properly. haha

0.054 = difference between 2.6 and 2.546

0.046 = difference between 2.546 and 2.5

2.5 is closer to 2.546 than is 2.6

Is that right? I don't know.

 

[Czar]

Originally posted by: tcsenter

for example if you had 2.546, i would round that to 2.6 where other people would round that 2.5

I would round that to 2.55.

If I HAD to go one place after the decimal, it is 'supposed' to be rounded down to 2.5. So it is you that doesn't do it properly. haha

0.054 = difference between 2.6 and 2.546

0.046 = difference between 2.546 and 2.5

2.5 is closer to 2.546 than is 2.6

Is that right? I don't know.

correct, at least I think so

 

[ObiDon]

What tcsenter said.

You just round weird.

 

[kherman]

Originally posted by: gopunk
i've noticed that a lot of people don't really do it properly... or at least not the same way as me

for example if you had 2.546, i would round that to 2.6 where other people would round that 2.5

i always thought you are supposed to round the 4 to a 5 because of the 6, then the 5 to a 6 because of the other 5.

Thought process way off! Only use the next least signifigant digit when rounding to any digit.

 

[Adrian Tung]

Well, that's very different from the way I would do it. I would need to know how many significant digits are needed in the rounding-up process first, so if you wanted only 2 significant digits then I would round it up to 2.5, if you wanted 3 digits I would round it up to 2.55 and so on.


atwl

 

[Ameesh]

you are rounding too much.