Place value - 1, 10, 100 More or Less - Presentation

Lesson 11 of a mathematics series delves into the concept of '1, 10, 100 More or Less' with a focus on place value. The lesson encourages students to use manipulatives to explore and understand the differences between adding or subtracting 1, 10, or 100 to a given number. Through a series of activities, students are challenged to identify the correct numbers that are either more or less by these increments. For instance, they might be asked to determine what is 10 more or 10 less than a number like 209, and consider the effect of these operations on the number's place value.

The lesson proceeds with various tasks, including filling in missing numbers in sequences that require adding or subtracting 10 and 100. Students are prompted to discuss the impact of these changes on the hundreds, tens, and ones columns, thereby reinforcing their understanding of place value. Additionally, reasoning activities challenge students to solve problems such as determining a mystery number based on given clues involving more or less operations. This includes tasks where students must work backwards, adding and subtracting to verify their answers, which helps to deepen their comprehension of the relationship between numbers and their place values.