1. 247,12(8)=2*8^2+4*8^1+7*8^0+1*8^(-1)+2*8^(-2)
А43(16)=10*16^2+4*16^1+3*16^0
2. НЕТ, т.к 1111(2)=F(16)
3. 24(x)=44(8)
2*x+4=4*8^1+4
x=16
24(16)=44(8)
4. 125.4(8)+35.2(8)-17.1(8)=162.6(8)-17.1(8)=143.5(8)
5. 1100(2)*1011(2)-11011(2)=10000100(2)-11011(2)=1101001(2)