When i use this code:
<?
  echo 120-119.1."\n";
  echo 120-119.2."\n";
  echo 120-119.3."\n";
  echo 120-119.4."\n";
  echo 120-119.5."\n";
  echo 120-119.6."\n";
  echo 120-119.7."\n";
  echo 120-119.8."\n";
  echo 120-119.9."\n";
?>
or with variables...results was:

0.90000000000001
0.8
0.7
0.59999999999999
0.5
0.40000000000001
0.3
0.2
0.099999999999994

Is it correct or no?

How can i get correct results without using round()???