Activities in this teaching pack include a set of differentiated worksheets to subtract pairs of four digit numbers with exchange between place value to show the amount of stock left in supermarket’s warehouse following sales. The class can use the formal method of decomposition when subtracting the pairs of numbers.

The interactive presentation gets the children to identify and describe the calculation steps that can be used when solving a number problem using a formal method of subtraction with exchange between place value.

This lesson is part of a maths scheme of work to get the children to identify and model how to solve contextual problems using formal written calculations for addition and subtraction including exchange between place value. There are teaching activities for shared learning, differentiated worksheets to support independent learning and interactive presentations to introduce concepts and key skills.