Binary Number Representations Comparison
Part of Binary Arithmetic · GCSE GCSE Computer Science revision
This comparison covers Binary Number Representations Comparison within Binary Arithmetic for GCSE Computer Science. Revise Binary Arithmetic in 3.3 Data Representation for GCSE Computer Science with 15 exam-style questions and 18 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 7 of 11 in this topic. Use this comparison to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 7 of 11
Practice
15 questions
Recall
18 flashcards
Binary Number Representations Comparison
| Representation | 8-bit Range | MSB Meaning | Use Case |
|---|---|---|---|
| Unsigned | 0 to 255 | +128 (normal place value) | Ages, counts, memory addresses |
| Sign & Magnitude | -127 to +127 | Sign bit (0=+, 1=-) | Rarely used (two zeros problem) |
| Two's Complement | -128 to +127 | -128 (negative place value) | Standard for signed integers |
Keep building this topic
Read this section alongside the surrounding pages in Binary Arithmetic. That gives you the full topic sequence instead of a single isolated revision point.
Practice Questions for Binary Arithmetic
In binary addition, what is the result of 1 + 1?
Explain the effect of a logical left shift and a logical right shift on the value of a binary number.
Quick Recall Flashcards
15 questions on Binary Arithmetic — practise free
Instant marking, adaptive difficulty, and 18 spaced repetition flashcards. Free until your GCSEs.
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