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Best Value
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Foundational skills
Understand what ‘per item’ pricing means
\[ \text{30p each} = \text{?} \]
Recognise that ‘each’ or ‘per item’ means the cost for one item.
Understand what ‘per kg’ pricing means
\[ \text{£2.50 per kg} = \text{?} \]
Recognise that ‘per kg’ means the cost for one kilogram.
Understand what ‘per 100g’ pricing means
\[ \text{45p per 100g} = \text{?} \]
Recognise that ‘per 100g’ is a standard unit for comparison.
Identify information needed to compare value
\[ \text{400g or 600g: need?} \]
Recognise that comparing value requires both price and quantity.
Unit price: per item
Calculate price per item (small pack)
\[ \text{4 for £2.80} \rightarrow \text{?p each} \]
Divide pack price by quantity.
Calculate price per item (larger pack)
\[ \text{12 for £3.60} \rightarrow \text{?p each} \]
Divide larger pack price by quantity.
Calculate price per item (rounding needed)
\[ \text{7 for £2} \rightarrow \text{?p each} \]
Divide and round the result.
Unit price: per kg
Calculate price per kg (whole kg packs)
\[ \text{2kg for £3.40} \rightarrow \text{£?/kg} \]
Divide price by weight in kg.
Calculate price per kg from grams
\[ \text{500g for £4} \rightarrow \text{£?/kg} \]
Convert grams to kg then find price per kg.
Unit price: per litre
Calculate price per litre
\[ \text{2L for £2.80} \rightarrow \text{£?/L} \]
Divide price by volume in litres.
Calculate price per litre from ml
\[ \text{500ml for £1.60} \rightarrow \text{£?/L} \]
Convert ml to litres then find price per litre.
Unit price: per 100g
Calculate price per 100g
\[ \text{400g for £2.40} \rightarrow \text{?p/100g} \]
Divide price by number of 100g units.
Calculate price per 100g (rounding needed)
\[ \text{350g for £2.50} \rightarrow \text{?p/100g} \]
Calculate and round unit price.
Unit price: per 100ml
Calculate price per 100ml
\[ \text{500ml for £3.50} \rightarrow \text{?p/100ml} \]
Divide price by number of 100ml units.
Using unit prices
Find cost from price per item
\[ \text{35p each} \times 6 = \text{?} \]
Multiply unit price by quantity.
Find cost from price per kg
\[ \text{£1.20/kg} \times 3\text{kg} = \text{?} \]
Multiply price per kg by weight.
Find quantity from budget and unit price
\[ \text{£3.20} \div \text{40p} = \text{?} \]
Divide budget by unit price.
Comparing values
Compare prices when quantities are equal
\[ \text{500g: £2.40 vs £2.65} \]
Identify cheaper option when sizes match.
Compare when one unit price is given
\[ \text{6 for £4.20 vs 75p each} \]
Calculate unit price for one option to compare.
Compare by calculating both unit prices
\[ \text{8 for £3.60 vs 6 for £2.58} \]
Calculate unit prices for both to compare.
Compare by scaling to same quantity
\[ \text{3 for £2.40 vs 5 for £3.75} \]
Scale or find common quantity to compare.
Compare when units differ (g vs kg)
\[ \text{250g for £2 vs 1kg for £6.80} \]
Convert to same unit before comparing.
Compare when volumes differ
\[ \text{330ml for 99p vs 2L for £5} \]
Convert to same unit before comparing.
Multibuys
Compare multipack with individual price
\[ \text{80p each vs 6 for £4.20} \]
Compare multipacks with buying individually.
Compare two multibuy offers
\[ \text{2 for £3 vs 3 for £4.20} \]
Compare two different multibuy deals.
Find saving from a multibuy offer
\[ \text{£1.40 each, 3 for £3.60} \]
Calculate normal price minus offer price.
Should I use the multibuy offer?
\[ \text{£1.20 or 2 for £2.10, need 3} \]
Determine optimal buying strategy.
Compare bulk vs regular pack
\[ \text{500g £1.80 vs 2kg £6.40} \]
Compare standard and bulk sizes.
Special cases
Handle recurring unit prices
\[ \text{3 for £1} \rightarrow \text{?p each} \]
Work with recurring decimals.
Compare per 100g with per kg
\[ \text{£3.20/kg vs 35p/100g} \]
Compare when unit bases differ.
Timer (Optional)
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Question