数字逻辑电路与系统设计习题答案
第1章习题及解答
1.1 将下列二进制数转换为等值的十进制数。 (1) (11011)2
(10010111)2
(3) (1101101)2 (
(11111111)2
(5) (0.1001)2 (
(0.0111)2
(7) (11.001)2 (
(101011.11001)2
题1.1 解:
(1) (11011)2 =(27)10
(10010111)2 =(151)10
(3) (1101101)2 =(109)10 (4)
(11111111)2 =(255)10
(5) (0.1001)2 =(0.5625)10
(6) (0.0111)2 =(0.4375)10 (7) (11.001)2 =(3.125)10 (8) (101011.11001)2 =(43.78125)10 1.3 将下列二进制数转换为等值的十六进制数
和八进制数。 (1) (1010111)2
(2468
))))
(2)
(2)
2
(110111011)2
(3) (10110.011010)2 (
(101100.110011)2 题1.3 解:
(1) (1010111)2 =(57)16 =(127)8
4)
(2) (110011010)2 =(19A)16 =(632)8 (3) (10110.111010)=(16.E8)=(26.72)2 16
8
(4) (101100.01100001)2 =(2C.61)16 =
(54.302)8
1.5 将下列十进制数表示为8421BCD码。 (1) (43)10 (95.12)10
(3) (67.58)10 (4) (932.1)10 题1.5 解:
(1) (43)10 =(01000011)8421BCD
(2) (95.12)10 =(10010101.00010010)
8421BCD
(2)
(3) (67.58)10 =(01100111.01011000)8421BCD (4) (932.1)10 =(100100110010.0001)
8421BCD
3