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Everyday maths 1
Everyday maths 1

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10 A quick reminder: checking your work

Next you can take a quiz to review what you have learned in this session. For this and later quizzes in the course you should check your answers. A check is an alternative method or reverse calculation – you may have heard this being called an inverse calculation. If the check results in a correct answer, it means that your original sum is correct too. For example, you may have made the following calculation:

  • 20 – 8 = 12

A way of checking this would be:

  • 12 + 8 = 20

Alternatively, if you wanted to check the following calculation:

  • 80 × 2 = 160

A way of checking this would be:

  • 160 ÷ 2 = 80

If you have carried out several calculations to get to your final answer, you only need to reverse one as a check.