Subtract the following hexadecimal numbers. FA 47 25 ? 22 18 ?? ? 22 17 CB ? 22

Question

Subtract the following hexadecimal numbers. FA 47 25 ? 22 18 ?? ? 22 17 CB ? 22 19 ?? c 22 18 CC 34 Convert the decimal numbers 275 and 965 to binary-coded decimal (BCD) and add. Select the BCD code groups that reflect the final answer. ? 1101 1110 1010 1110 1010 1110 0001 0010 0100 0000 0010 0011 0100 0000 c 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: ignore the lowest order code group because 0000 is a valid code group and prefix the carry with three zeros add 0110 to both code groups to validate the carry from the lowest order code group disregard the carry and add 0110 to the lowest order code group add 0110 to the lowest order code group because a carry was generated and then prefix the carry with three zeros

Explanation / Answer

1)

47 - 25 = 22
34 -1C = 18
FA - 2F = CB

2)
0010 0111 0101 = 275
1001 0110 0101 => 965
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0001 0010 0100 0000 (C) is the Answer
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3) d
Add 0110 to lowest code group

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