Adding and subtracting with negative numbers is taught through the use of a number line. As learning progresses students begin to visualise the calculation and use written methods for larger and smaller values. Students later apply their learning to complete number pyramids involving a mixture of positive and negative integers.
Differentiated Learning Objectives
- All students should be able to add and subtract with negative numbers using a number line.
- Most students should be able to add and subtract with negative numbers using written methods.
- Some students should be able to recognise that a 3 - -2 becomes 3 + 2 through a change of direction on the number line.