Dear forum,

Both the 7.8 and the 7.7 are actually 7.75mm, exactly the same dimension. Why is it rounding one up and one down? Also some screenshots included of relevant document properties:

Kind regards,

Sjoerd

Dear forum,

Both the 7.8 and the 7.7 are actually 7.75mm, exactly the same dimension. Why is it rounding one up and one down? Also some screenshots included of relevant document properties:

Kind regards,

Sjoerd

i just did a test with one dimension as 7.75 and another as 7.749 and got the same result as seen in Sjoerd van De Velde's image. and when i set the decimal places to 2 they both show 7.75

Thanks... annoying, I tried this before posting my question with 3 decimals, it shows 7.75 and 7.75.. Only when it set it to 4 decimals it shows a difference: 7.7501 and 7.7499.

Am I misunderstanding rounding here? When rounding you look at the next digit only. So when rounding to 1 decimal place you only look at the second decimal place. In this case:

7.74 = 7.7

7.75 = 7.8

I don't know, maybe they're teaching that differently now...

it is doing exactly what it should. when rounding 7.74 to one decimal place the 7 remains unchanged. when rounding 7.75 to one decimal place the 7 becomes 8. just because 7.7499 rounded to 3 decimal places makes it 7.750 doesn't mean that 7.7499 rounded to 1 decimal place should be 7.8. it's not going to round an already rounded number it is going to round the original value.

i just did a test with one dimension as 7.75 and another as 7.749 and got the same result as seen in Sjoerd van De Velde's image. and when i set the decimal places to 2 they both show 7.75