| 1 | A | B | C |
| --- | --- | --- | --- |
| 2 | Two's complement |  |  |
| 3 | Decimal value | Binary (two's-complement representation) | Two's complement (28 − n)2 |
| 4 | 0 | 0000 0000 | 0000 0000 |
| 5 | 1 | 0000 0001 | 1111 1111 |
| 6 | 2 | 0000 0010 | 1111 1110 |
| 7 | 126 | 0111 1110 | 1000 0010 |
| 8 | 127 | 0111 1111 | 1000 0001 |
| 9 | −128 | 1000 0000 | 1000 0000 |
| 10 | −127 | 1000 0001 | 0111 1111 |
| 11 | −126 | 1000 0010 | 0111 1110 |
| 12 | −2 | 1111 1110 | 0000 0010 |
| 13 | −1 | 1111 1111 | 0000 0001 |

Question: How does the first number (significant bit) affect whether the integers are positive or negative?
Answer: The two's complement 8-bit number represents positive integers from 0 to 127 (01111111), the rest of the combinations with the most significant bit as '1' represent the negative integers −1 to −128.