SATS How To...
Welcome to the all new SATS How-to page. Here we will teach you valuble techniques that can be applied in your Maths, English & Science SATS exams, whatever the level. Forgotten how to convert a fraction? Unsure about how to plan an essay? Then the SATS How-to is for you!
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| how to look for a sensible answer |
Looking for a Sensible Answer
When we are confronted with a problem it is often helpful to make an estimate of a rough answer to get a feel for the real answer we are seeking.
When undertaking experiments or research, it can be useful to have an understanding of the sensible limits of the answer we need.
1.89 x 4.01 is close to 2 x 4, therefore the answer will be about 8
(Accurate answer 7.5789 )
e.g. A pack of ten plums in a Supermarket has a weight of 400g. Each individual plum will therefore weigh approximately 40g. It is unlikely that any plum will weigh exactly 40g, but in any calculation of the average weight of each plum, this will be about right.
If any calculation of the weight of any individual plum comes to more than, say, 55g or less than, say 25g. our calculation is likely to be incorrect, as the answer is not sensible in the context of Supermarket plums.
A range of 30g difference in weight between the smallest and largest plums in the pack is obviously very large, and not likely in any Supermarket package, so we may need to investigate more closely to get an accurate estimation of the weights.
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