Four ‘Crack The Safe’ activities on fractions: adding/subtracting, multiplying/dividing, mixed numbers and fraction of an amount.

Each contains six questions and 10 possible answers. The reason behind this is to allow students to check their own answers whilst the teacher can spend time with anyone who requires more help.

I find these work nicely as starters or plenaries but obviously you can use them however you like.

Andy Lutwyche is a purveyor of mathematics and a producer of resources, more of which you can find on his TES shop. You can also follow him on Twitter at @andylutwyche.

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