Starter quiz
- Identify the inputs for this sentence: “If it is raining and not windy, I take an umbrella.”
- umbrella (U)
- raining (R) ✓
- windy (W) ✓
- weather (W)
-
- A=0 B=1. Give the value of this expression: Q = NOT (A AND B).
- 1 ✓
- 0
-
Which logic gate is represented by this symbol?- OR
- AND ✓
- NOT
-
Which logic gate is represented by this symbol?- NOT
- AND
- OR ✓
-
Which logic gate is represented by this symbol?- NOT ✓
- OR
- AND
-
- Write an expression for this sentence: “I’ll go bowling (B) if my friend (F) is coming and I have enough pocket money (M)”.
- 'B = F AND M' ✓
Exit quiz
- Which logic gate has the highest operator precedence?
- OR
- NOT ✓
- AND
-
- Sofia created a logic circuit to show that cake AND ice cream is NOT allowed. Which logic statement correctly represents this?
- NOT (cake AND ice cream) ✓
- (cake AND ice cream)
- NOT (cake OR ice cream)
- (NOT cake) AND ice cream
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- Match the logical expressions to the logic gates required.
- Q = A OR B AND C⇔one AND gate, one OR gate ✓
- Q = NOT A OR B⇔one NOT gate, one OR gate ✓
- Q = A AND B OR C AND NOT D⇔one NOT gate, two AND gates, one OR gate ✓
- You are tasked with designing a logic circuit for the statement: "Q = A AND B or C". Which of the following logic gates do you need, and what is the correct order of evaluation?
- one AND gate and one OR gate, evaluate AND first ✓
- one AND gate and one OR gate, evaluate OR first
- two OR gates and one AND gate, evaluate OR first
- two AND gates and one OR gate, evaluate AND first
-
Worksheet
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Presentation
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Video
Lesson Details
Key learning points
- A logic circuit is a set of two or more logic gates that are connected to implement more complex logic.
- A digital electronic circuit in a computer system is used to realise solutions to problems.
- A circuit diagram illustrates how logic gates are combined to create digital circuits.
Common misconception
Pupils often find it difficult to know what order logic gates should be evaluated. Without brackets, there is still an order of precedence.
Remind pupils of how the order of precedence in maths is applied to calculations. In a similarway, logic gates should be evaluated in the order: brackets, NOT, AND, OR.
Keywords
Logic circuit - a combination of two or more logic gates used to represent a more complex logical statement
Circuit diagram - a picture used to represent a more complex logical statement
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