FRAHT
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units of gas costs 4.2 pence. On average Ria uses 50.1 units of gas a week. She pays for the gas she uses in 13 weeks. Work out an estimate for the amount ria pays
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gdswefqwe
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Work out an estimate for the amount ria pays
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FRAHT
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(Original post by gdswefqwe)
Work out an estimate for the amount ria pays
what estimate would you give
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FRAHT
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(Original post by FRAHT)
what estimate would you give
i'm not really good at estimating so can you help me please
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Obliviously
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So for estimating, you typically round to 1/2 significant figures, and then do the question in the same method as you would do

How I'd do it:
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I'd round 4.2 to 4, 50.1 to 50. Multiplying these would give 200 pence per week. Then you could possibly round 13 to 10 and multiply that with the 200 to = 2000 pence, but you could leave the 13 as it is and multiply it to give a more accurate estimation of 2600
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