In binary subtraction using the simple method, when a borrow is taken from the…
2025
In binary subtraction using the simple method, when a borrow is taken from the next higher-order digit, what is the general effect on that digit's value?
- A.
It remains unchanged
- B.
It is incremented by 1
- C.
It is decremented by 1
- D.
It becomes 0
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Correct answer: C
In the simple method of binary subtraction, if a lower-order bit needs a borrow, the borrow is taken from the next higher-order digit. The digit that gives the borrow is decremented by 1.
If that digit was 1, it becomes 0 after giving the borrow. However, the general rule is not 'always becomes 0'; the general rule is that the borrowing source digit is reduced by 1.
Therefore, option C is correct: it is decremented by 1.