1) (7-2,5)*(3,25+3,35):(10-9,73)=4,5*6,6/0,27=110
2) (81,8+18,1):(4-0,67)*(0,97+0,28)=99,9/3,33*1,25=37,5
3) (90-2,5)*2,66-0,06):10,75+10,3=(87,5*2,66-0,06)/21,05=232,69/21,05=11,05