The temperature in London at midnight was −8∘C-8^{\circ}\text{C}−8∘C. By 11 am, the temperature had risen by 13∘C13^{\circ}\text{C}13∘C.
Work out, in one calculation, the temperature at 11 am.
370 exam-style questions on AQA GCSE Maths Negative Numbers. Each one has a worked solution and a mark scheme showing where the marks go.