# Year 2 Calculation - Inverse Operations

*This quiz addresses the requirements of the National Curriculum KS1 Maths and Numeracy for children aged 6 and 7 in year 2. Specifically this quiz is aimed at the section dealing with checking calculations using the inverse operation. *

In order to check a calculation, it is useful to know the inverse (or opposite) operation. For example, the inverse operation of addition is subtraction so to check 5 + 6 = 11, you could try 11 - 6 = 5 or 11 - 5 = 6. Another way of checking an addition calculation would be to add the numbers up in a different order - this of course does not work for subtraction!

## We're sorry but...

This quiz is for members only, but you can play our Year 1 Calculation - Addition quiz to see how our quizzes work.

If you're already a subscriber, you can log in here

Or take a look at all of our KS1 Maths quizzes.

Or if you're ready to take the plunge, you can sign up here.