11001(2) + 10(2) = ???(2) = ???(10)
10101(2) - 10(2) = ???(2) = ???(10)
11101(2) * 10(2) = ???(2) = ???(10)

11101(2)=29(10)

10(2)=2(10)

29+2=31(10) = 11111(2)

29-2=27 = 11011(2)

29*2=58 = 111010(2)

11001(2) + 10(2) = 11111(2) =31(10)

10101(2) - 10(2) = 11011(2) = 27(10)

11101(2) * 10(2) = 111010(2) = 58(10)