Question
Mrs Fanny bought a 3-litre bottle of syrup. She used 13 ℓ of the syrup in February and 16 ℓ in March. How much oil had she left?
3 m

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Mrs Fanny bought a 3-litre bottle of syrup. She used 13 ℓ of the syrup in February and 16 ℓ in March. How much oil had she left?