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Whenever you are buying or selling most things. If one can of soup costs $0.75, how much does three cans cost? If the fabric is £7.99 per metre, how much will 4.3 metres be?

More complicated: a plumber charges £25 call out and then £35 per hour (or part). How much would a 2-hour job cost? Another charges £40 call out but £25 per hour. Is she cheaper or more expensive?

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9y ago

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