Addition and Subtraction - Adding four digit numbers (one exchange) - Presentation

The presentation on adding four-digit numbers with one exchange is an educational resource designed to enhance students' understanding of place value and the process of exchanging when numbers exceed ten in a given column. The lesson begins by prompting students to recall what happens when more than nine units accumulate in any place value column. Through a series of activities, students use place value counters to visually add together four-digit numbers, identifying when an exchange is necessary—such as turning ten ones into a ten, ten tens into a hundred, and ten hundreds into a thousand—and moving the counter to the appropriate column. The lesson further reinforces this concept by instructing students to write down the calculations numerically, clearly showing the exchanged values underneath the relevant place value columns.

As the lesson progresses, students engage with practical examples that contextualise their learning. One activity involves calculating the total cost of items such as phones, laptops, and tablets, demonstrating the real-life application of the addition skills they are developing. Through these exercises, students gain fluency in the addition of four-digit numbers and the process of exchanging across different place value columns. The lesson concludes with a reasoning task where students must identify correct and incorrect strategies in sample calculations, further deepening their comprehension of the subject. The presentation aims to solidify students' mathematical skills in addition while ensuring they understand the underlying principles of place value and exchange.