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7 Tips To Help You Pass Maths (based On GCSE Level, England)
Recently I've been helping out GCSE students and have put together a few useful tips for you all :)
With grouped data find the cumulative frequency to find the medium interval. When finding the mean of group data find the midpoint of each group and multiply it by the frequency, then use this as your total values and divide by the total frequencies
When given a question where you have an amount which is less than 100% eg £20 is the price after being reduced by 20%, what was its original price? 100% - 20% = 80% so £20 is 80% 20/80 x 100 gives original price = £25
Follow the order of BIDMAS: Brackets, indices, division, multiplication, add and subtract