52. Binary subtraction of a decimal 15 from 43 will utilize which two's complement?
53. Which of the following is the primary advantage of using binary-coded decimal (BCD) instead of straight binary coding?
54. Convert each of the decimal numbers to two's-complement form and perform the addition in binary.
+13 –10 add –7 add +15
55. Add the following binary numbers.
0010 0110 0011 1011 0011 1100 +0101 0101 +0001 1110 +0001 1111
56. The carry propagation delay in full-adder circuits:
57. What is the difference between a full-adder and a half-adder?
58. The summing outputs of a half- or full-adder are designated by which Greek symbol?
59. Subtract the following hexadecimal numbers.
47 34 FA –25 –1C –2F
60. What is the correct output of the adder in the given figure, with the outputs in the order:
61. The BCD addition of 910 and 710 will give initial code groups of 1001 + 0111. Addition of these groups generates a carry to the next higher position. The correct solution to this problem would be to:
62. Subtract the following binary numbers.
0101 1000 1010 0011 1101 1110 –0010 0011 –0011 1000 –0101 0111
63. Why is a fast-look-ahead carry circuit used in the 7483 4-bit full-adder?
64. Find the 2's complement of –1101102.
65. What logic function is the sum output of a half-adder?
66. The binary adder circuit is designed to add ________ binary numbers at the same time.
67. An ALU is a multipurpose device capable of providing several different logic operations.
68. BCD arithmetic is performed using base 10 numbers.
69. A full adder has a carry-in.
70. Hexadecimal is a base 4 numbering system.
71. The solution to the binary problem 00110110 – 00011111 is 00011000.
72. A binary sum is made up of only 1s and 0s.
73. Overflow indicators in ALU circuits indicate when add or subtract operations produce results that are too large to fit into four bits.
74. The inputs of a full adder are labeled A1, B1, and Cin.
75. Larger number capacities may be obtained from 2-bit adders by paralleling them.