34,5+9,11-9,2:6,4+3,1(6)=
=345/10+911/100- 92/10:64/10+(316-31)/90=
=(10×345+911)/100 - 92/10×10/64 + 285/90=
=(3450+911)/100 -23/16+157/18
=4361/100-23/16+157/18
=(4361×16×18-23×100×18+157×100×23)/(18×16×100)
=(1255978 - 41400 + 361100)/28800
=1575678 / 28800 = 787839 / 14400
=54,711041666
