Question
Mrs Dana bought a 4-litre bottle of detergent. She used 15 ℓ of the detergent in April and 710 ℓ in May. How much oil had she left?
3 m

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Mrs Dana bought a 4-litre bottle of detergent. She used 15 ℓ of the detergent in April and 710 ℓ in May. How much oil had she left?