A.(11010.111)2 B.(11001.0101)2 C.(11001.1101)2 D.(11001.1111)2
A.(1101.1100)2; B.(1100.1101)2; C.(1011.1011)2; D.(1011.1010)2.
A.(0.11001)2; B.(0.10011)2; C.(0.10010)2。