A film is m m\,m minutes long. A documentary is 15 minutes shorter than the film.
Write an expression for the length, in minutes, of the documentary.
Practise OCR GCSE Maths Writing an Expression with exam-style questions for Foundation and Higher tier. 64 questions, matched to the OCR GCSE Maths (J560) specification and written in the written papers style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.