A digital depth sensor records two elevations relative to sea level as -13 m and -7 m. These elevations are represented in a computer system as 8-bit signed integers using two's complement.
Complete the table to show the binary addition of these two negative numbers.
| Place Value | -128 | 64 | 32 | 16 | 8 | 4 | 2 | 1 |
|---|---|---|---|---|---|---|---|---|
| -13 | ||||||||
| -7 | ||||||||
| Result |
117 exam-style questions on Edexcel GCSE Computer Science Binary, covering Binary representation and number of states, Unsigned and two's complement integers, Converting denary and 8-bit binary, Binary addition and binary shifts, Concept of overflow, and Hexadecimal notation and conversion. Each one has a worked solution and a mark scheme showing where the marks go.