Order of Operations in Logic Circuits
This key facts covers Order of Operations in Logic Circuits within Truth Tables for GCSE Computer Science. Revise Truth Tables in 3.4 Computer Systems for GCSE Computer Science with 15 exam-style questions and 15 flashcards. This topic appears less often, but it can still be a useful differentiator on mixed-topic papers. It is section 9 of 11 in this topic. Use this key facts to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 9 of 11
Practice
15 questions
Recall
15 flashcards
Order of Operations in Logic Circuits
Just like mathematics has BIDMAS/PEMDAS, Boolean logic has an order of operations:
| Priority | Operation | Example |
|---|---|---|
| 1st (highest) | Brackets / Parentheses | Evaluate (A OR B) before anything else |
| 2nd | NOT | NOT(A) is evaluated before AND/OR |
| 3rd | AND | A AND B is evaluated before OR |
| 4th (lowest) | OR | OR is evaluated last |
Example: NOT(A) AND B OR C
- Step 1: Calculate NOT(A)
- Step 2: Calculate NOT(A) AND B
- Step 3: Calculate [NOT(A) AND B] OR C
Keep building this topic
Read this section alongside the surrounding pages in Truth Tables. That gives you the full topic sequence instead of a single isolated revision point.
Practice Questions for Truth Tables
How many rows are needed in a truth table with 2 inputs (not including the header row)?
Explain why truth tables are useful when designing or testing logic circuits.
Quick Recall Flashcards
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