1) 110100,11₂ = 2⁵+2⁴+2²+1/2+1/4=32+16+4+2/4+1/4=52=52,75
123,41₈=8²+2*8+3+4/8+1/64=64+16+3+33/64=83,515625
1DE,C8₁₆=16²+13*16+14+12/16+8/256=478,78125
2) 1001111110111,0111₂=11767,34₈=5111,7₁₆
1011110011100,11₂= 13634,6₈=179C,C₁₆
3) 1011₂+11₂=1110₂
1011₂+111,1₂=10010,1₂
11₂+111,1₂= 1010.1₂
1011₂=11
11₂=3
111,1₂=7.5
1110₂=14
10010.1=18.5
1010.1₂=10.5
4) 101₂*1111,001₂= 1001011,101₂
101₂=5
1111,001=15.125
1001011,101₂=75,625