100 More or Less - PowerPoint

In a set of engaging maths teaching resources aimed at Year 3 students, the concept of finding numbers that are 100 more or 100 less is explored. The PowerPoint presentation and accompanying worksheets provide a clear and interactive way for children to grasp number and place value changes. The process is straightforward: to find a number that is 100 more, students simply add 1 to the hundreds place of a given number. Conversely, to find a number that is 100 less, they subtract 1 from the hundreds place. This method helps students understand how to manipulate numbers in the hundreds column to quickly and accurately calculate the required values.

The resources include a series of slides and worksheets that prompt students to apply this knowledge. Each slide presents a number in a hundreds, tens, and ones format, and students are challenged to determine what the number would be if 100 more or 100 less. For example, if presented with the number 731 in a hundreds, tens, and ones breakdown, finding 100 more would result in 831, while finding 100 less would lead to 631. These exercises not only reinforce understanding of place value but also encourage quick mental arithmetic, as some slides challenge students to respond within a two-second time limit before being timed out, adding an element of fun and urgency to the learning experience.