Place value - 1, 10, 100 more or less - Presentation

In a comprehensive lesson about place value, students are introduced to the concept of finding 1, 10, or 100 more or less than a given three-digit number. Utilising Base 10 blocks and place value counters, the lesson aims to deepen understanding of how numbers are constructed and how they can be manipulated. The lesson starts with a discussion to activate prior knowledge about the concept of adding or subtracting 10 or 100 from a number. Students are then presented with a series of activities where they are required to determine the numbers that are 10 or 100 more or less than a specified number, ensuring they grasp the significance of each place value column in the process.

The activities are designed to cater to various levels of proficiency, starting with simple tasks and progressing to more complex ones. For example, students might be asked to find 10 more or 10 less than 840, or to explore what happens when subtracting 10 from 209. The exercises encourage students to discuss and reason out their answers, fostering a deeper understanding of the number system. Additionally, the lesson includes reasoning challenges where students must apply their knowledge to solve problems, such as determining an unknown number based on given conditions related to place value. These activities not only reinforce the concept of place value but also develop critical thinking and problem-solving skills.