In Russian language, as well as in English, a two-digit complex number typically writes and pronounced as two separated words, that is:
number of tens + units.
For example:
21 = 20 + 1
twenty - one
ДВАДЦАТЬ - ОДИН
DVATSAT` - ADIN
_______________________
32 = 30 + 2
thirty - two
ТРИДЦАТЬ - ДВА
TRITSAT` - DVA
_______________________
56 = 50 + 6
fifty - six
ПЯТЬДЕСЯТ - ШЕСТЬ
PETDESYAT` - SHEST`
_______________________
98 = 90 + 8
ninety - eight
ДЕВЯНОСТО - ВОСЕМЬ
DEVYANOSTA - VOSEM`
etc