TESOL/Numbers

Which number do you hear?
(American English)

{ + 19 - 90
 * type=""}

{ - 30 + 13
 * type=""}

{ - 14 + 40
 * type=""}

{ + 30 - 13
 * type=""}

{ + 16 - 60
 * type=""}

{ + 70 - 17
 * type=""}

{ + 60 - 16
 * type=""}

{ + 90 - 19
 * type=""}