Electronics - Arithmetic Operations and Circuits - Discussion

Discussion Forum : Arithmetic Operations and Circuits - General Questions (Q.No. 7)
7.
How many basic binary subtraction combinations are possible?
4
3
2
1
Answer: Option
Explanation:
No answer description is available. Let's discuss.
Discussion:
1 comments Page 1 of 1.

Timple said:   1 decade ago
If we look at the possibilities involved in subtracting one 1-bit number from another, we can quickly see that three of the four possible combinations are easy and straight-forward. The fourth one involves a bit more:

0 - 0 = 0
1 - 0 = 1
1 - 1 = 0
0 - 1 = 1, with a borrow bit.

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