Understanding the relationship between addition and subtraction is an important part of maths work in Year 1. This includes writing the subtraction fact that corresponds to a given addition fact (eg 9 + 3 = 12 implies that 12 – 9 = 3 etc). This understanding is incredibly useful when answering both addition and subtraction questions, as well as knowing that adding on can be used to work out a subtraction question such as 10 take away 6.Whilst most of our pages concentrate on just addition or subtraction we have just published new sets of worksheets with mixed addition and subtraction. Number lines are available to help with these and they can all be found in our Year 1 Subtraction category.Go to Year 1 Subtraction