Apples cost 25p each. Bananas cost 20p each. The total cost of a a\,a apples and b b\,b bananas is CCC.
Verify that C=25a+20bC = 25a + 20bC=25a+20b.
267 exam-style questions on OCR GCSE Maths Writing an Expression. Each one has a worked solution and a mark scheme showing where the marks go.