Activities in this teaching pack include a differentiated worksheets to practise subtracting ones from different two digit numbers to calculate numbers of items sold at a Christmas market by using counting back on to complete each number calculation.

The interactive presentation gets the children to explore how to calculate numbers of items sold at a Christmas market by subtracting ones from different two digit numbers.

This lesson is part of a maths scheme of work to get the children to practise using mental calculations and informal written calculations to add and subtract pairs of two digit numbers. There are teaching activities for shared learning, differentiated worksheets to support independent learning and interactive presentations to introduce concepts and key skills.