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Mathematics Activity: Buy One Get One Free! Best Buys

In this free-standing mathematics activity, students will analyze different offers to determine the best buy. They will calculate the cost per item and consider why someone might not choose the best offer. Topics include file folders, CDs, and beverage packs.

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Mathematics Activity: Buy One Get One Free! Best Buys

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  1. Free-Standing Mathematics Activity Buy one get one free! Best buys Special offer! 5 for £4

  2. Special offer! 5 for £4 Folders 89 pence each • How much does each file cost if you use the special offer? • Which is the best buy – single files or the special offer? • Can you think of any reasons why someone might not use the special offer? Many items are sold in different-sized packs for different prices. In this activity you will work out which is the ‘best buy’

  3. 5-pack90 minutes each £5.50 10-pack 80 minutes each £7.95 12-pack 90 minutes each £9.99 • Which pack of CDs is the best buy? • Why might someone not choose the best buy?

  4. 1 can (330 ml) 50 pence 6-pack cans(330 ml each) £1.99 Regular bottle (1.5 litres) £1.50 Large bottle (3 litres)£2.80 • Which of these is the best buy? • Why might you not choose the best buy?

  5. At the end of the activity • Have you bought anything recently where you had to choose which size (or pack) to buy? • How did you decide which one to buy? • Did you choose the ‘best buy’? • If not, why not?

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