Addition and Subtraction - Subtract four digit numbers (more than one exchange) - Presentation

In a comprehensive lesson about subtracting four-digit numbers, students are challenged with scenarios where multiple exchanges are required. The lesson begins with a discussion encouraging students to explain the concept of exchanging in subtraction calculations. Using place value counters, they are guided through a series of subtraction exercises, ensuring they understand when and how to exchange between columns for accurate results. The lesson's fluency and reasoning slides provide a structured approach to mastering the subtraction of large numbers, with clear examples showing the step-by-step process of exchanging when the top digit is smaller than the bottom digit.

Further activities involve real-life applications, such as calculating the remaining number of sweets in a sweet shop after sales and determining the number of balloons left after a weekend at a party shop. Students also engage in problem-solving exercises where they must find missing numbers and correct miscalculations. For instance, they assess the work of two characters, Tia and Rosie, to determine who correctly subtracted 544 from 3,233. The lesson emphasizes the importance of careful column subtraction and the use of inverse operations to check calculations, equipping students with the skills to handle complex arithmetic confidently.