Tomato sauce

Overview

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Connecting to the Curriculum

Marking Student Responses

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Further Resources

This task is about working out the best price.

This table shows the prices for all the different types of tomato sauce and container sizes available at a supermarket.

Question 1Change answer

a) If Petra chose a 500 ml container, which brand would be the best value for money? CrestAcornWatkins

b) Karen bought some 250 ml bottles of Watkins tomato sauce for $2.25 a bottle.

How much would a litre cost if she bought several of these bottles? $

c) Joseph bought some 750 ml bottles of Crest tomato sauce that each cost $6.45.

i) How many bottles would he need to buy to have 3 litres of sauce?

ii) How much would each litre of sauce cost him? $

d) To get the best value for money, you should buy the CrestAcornWatkins brand

of sauce in a ml container.

Task administration:

This task is completed with pencil and paper or online (WITH automarking).

Level:

Curriculum info:

Keywords:

Description of task:

Students work out the costs and the best value for money of a range of tomato sauce bottles.

Learning Progression Frameworks

This resource can provide evidence of learning associated with

within the Mathematics Learning Progressions Frameworks.

Answers/responses:

Diagnostic and formative information:

	Common error	Likely calculation	Likely reason
c) ii)	25.80	6.45 × 4	Cost of 3 litres.
d)	Acorn, 1000		Assumes 1000 ml will be most economical size.