Students learn how to subtract with positive and negative numbers on a number line and using written methods. More able students substitute negative numbers into simple expressions.
The start of the lesson is used to recap adding with negative numbers. In the main part students are shown how to perform subtraction with negative using a number line. This leads on to using written methods to solve harder problems. At the end students try to find two numbers that have a given sum and difference.
Differentiated Learning Objectives
- All students should be able to use a number line to find the difference between a pair of integers.
- Most students should be able to use written methods to calculate the difference between positive and negative integers.
- Some students should be able to subtract with negative integers using written methods.