Starter quiz
- Proportion is a part to ______ (sometimes part to part) comparison.
- 'whole' ✓
- If two things are ______ then the ratio of part to whole is maintained and the multiplicative relationship between parts is also maintained.
- 'proportional' ✓
- A unit is one of something that defines the '______' you are counting in.
- 'one' ✓
- Which of the following are common multiples of 3 and 5?
- 9
- 15 ✓
- 21
- 25
- 30 ✓
-
- What is the lowest common multiple of 4 and 6?
- 6
- 12 ✓
- 24
- 48
-
- Put these in order, starting with the best value for money.
- 1⇔Pack of 8 cupcakes £5
- 2⇔Buy 2 cupcakes, get 1 cupcake free. Cupcake = £1
- 3⇔Pack of 4 cupcakes £2.80
- 4⇔Pack of 5 cupcakes £3.90
Exit quiz
Andeep needs 1 kg of carrots for a recipe which feeds 4 people. What is the price per 100 grams for a 150 g bag of carrots?- '£1.07' ✓
- Andeep needs 1 kg of carrots for a recipe which feeds 4 people. What is the price per 100 grams for a 400 g bag of carrots?
- '£0.55' ✓
- Andeep needs 1 kg of carrots for a recipe which feeds 4 people. What is the price per 100 grams for a 600 g bag of carrots?
- '£0.60' ✓
- Andeep needs 1 kg of carrots for a recipe which feeds 4 people. What would be the cheapest way to buy enough carrots to feed 4 people?
- 7 bags of 150 g
- 2 bags of 400 g and 2 bags of 150 g
- 3 bags of 400 g
- 1 bag of 400 g and 1 bag of 600 g ✓
- 2 bags of 600 g
-
- Andeep needs 1 kg of carrots for a recipe which feeds 4 people. What would be the cheapest way to buy enough carrots to feed 8 people?
- 2 bags of 400 g and 2 bags of 600 g
- 3 bags of 600 g
- 5 bags of 400 g ✓
- 14 bags of 150 g
-
- Andeep needs 1kg of carrots for a recipe which feeds 4 people. What would be the cheapest way to buy enough carrots to feed 12 people?
- 5 bags of 600 g
- 7 bags of 400 and 1 bag of 150 g
- 8 bags of 400 g ✓
- 20 bags of 150 g
-
Worksheet
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Lesson Details
Key learning points
- Promotions do not always offer the best value for money.
- Advertisements often use data to make their point.
- The validity of the data and conclusions should not be assumed.
Common misconception
Pupils may think that it is always best to buy a 'deal' as deals are always a good thing.
Throughout the lesson it is demonstrated that a deal or promotion may not always be right for every customer. Is a deal worth it if you don't need to buy that much?
Keywords
Proportion - Proportion is a part to whole (sometimes part to part) comparison.
Unit - A unit is one of something that defines the 'one' you are counting in.
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