Addition and Subtraction - Adding whole numbers with more than 4-digits - Presentation

In the third lesson on adding whole numbers with more than four digits, students revisit addition strategies and apply them to larger numbers. The lesson encourages pupils to engage in discussions about what constitutes a number with more than four digits and how to approach adding such numbers. The teaching slides provide a step-by-step guide using a place value grid and counters to visually represent the addition process. This method is paired with the column addition technique to reinforce understanding of the underlying mathematical concepts. Students are prompted to consider which columns will be affected during the addition and how the column method translates the concrete representation into a formal calculation.

Activities in the lesson challenge students to apply their knowledge by calculating sums of large numbers, both with and without the same number of digits. They are also tasked with creating stories to contextualize each calculation, fostering a deeper comprehension of the practical application of addition in real-life scenarios. The lesson includes reasoning exercises, such as the one involving a Gattegno chart, where students deduce the movement of counters to find the resulting number. Independent work sections encourage students to demonstrate their understanding by cutting out problems and showing their calculations in their books. Discussion points throughout the lesson prompt critical thinking about the necessity of exchanging, the impact of different digit amounts, and the order of numbers in calculations.