информатика помогите​

1010101,011(2) = 2^6+2^4+2^2+2^0+2^(-2)+2^(-3) =

= 64+16+4+1+0,25+0,125=85,375(10)

531,27(8) = 5*8^2+3*8^1+1*8^0+2*8(-1)+7*8^(-2) =

= 320+24+1+0,25+0,109375 = 345,359375(10)

2EF8,41(16) = 2*16^3+14*16^2+15*16^1+8*16^0+4*16^(-1)+1*16^(-2) =

= 8192+3584+240+8+0,25+0,00390625 = 12024,25390625(10)