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
(2) (10010111)
2
(3) (1101101)
2
(4) (11111111)
2
(5) (0.1001)
2
(6) (0.0111)
2
(7) (11.001)
2
(8) (101011.11001)
2
题 1.1 解:
(1) (11011)
2
=(27)
10
(2) (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
(2) (110111011)
2
(3) (10110.011010)
2
(4) (101100.110011)
2
题 1.3 解:
(1) (1010111)
2
=(57)
16
=(127)
8
(2) (110011010)
2
=(19A)
16
=(632)
8
(3) (10110.111010)
2
=(16.E8)
16
=(26.72)
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
(2)(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
(3) (67.58)
10
=(01100111.01011000)
8421BCD
(4) (932.1)
10
=(100100110010.0001)
8421BCD
1.7 将下列有符号的十进制数表示成补码形式的有符号二进制数。
(1) +13 (2)−9 (3)+3
- 1
- 2
- 3
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