Warning: ini_set(): A session is active. You cannot change the session module's ini settings at this time in /customers/8/6/8/ispeakswedish.com/httpd.www/inc/config.php on line 6
So trettio is pronounced
tretti, femtio is pronounced
femti, sjuttio is pronounced
Nio (9) and tio (10) are often pronounced nie and tie respectively.
For numbers that end in -tio, other than tio (10) itself, the final o is usually dropped.