A common difficulty is dealing with numbers in task 1. With a pie chart, line graph or table you need be able to summarise the key details: to do this you need the language of numbers, as you should not simply write out all the numbers – it is a summarising task. This can be surprisingly complex to do as the figures in most task 1 exercises are not “simple figures” but rather more complex.
How to describe differences accurately
40 is double is 20, but what about 42 and 20? Or 30 and 88?
These are the sort of “complex figures” you may need to describe in the exam and the examiner is looking for an accurate description of just this type of numbers. What you need to do is compare the numbers. Here is some helpful language for you: it is important that you have some variations here
So 40 is exactly double 20
42 is approximately double 20
30 is just over a third of 88
More language of numbers
To do this well, you need some mathematical language too:
More task 1 help Exercises using numbers How to compare numbers