This is a powerpoint lesson slides on negative numbers. There is enough content contained in these slides to last for 3 hours. In these slides there are activities and questions with answers for negative numbers in context, adding, subtracting, multiplying and dividing negative numbers. As an extension at the end there are some BIDMAS / BODMAS with negative numbers questions with answers. The rules from negative numbers are also explained for students to make notes on. Exercises on negative numbers are differentiated and answers provided so students can self or peer assess their work.