Multiplication and Division (1) - Multiply by 100 - Presentation

The lesson on multiplying by 100 is a continuation from the concept of multiplying by 10, encouraging students to observe the patterns and changes that occur in the numbers. It begins with a discussion prompting students to reflect on their experiences with multiplying by 10, setting the groundwork for the new multiplication factor. The lesson then moves on to a series of activities where students are asked to complete sentences that demonstrate their understanding of how the Base 10 system aids in visualizing the multiplication process by 100. They are encouraged to think about the practical applications of multiplying by 100 in real-life scenarios and to explore the difference in magnitude between multiplying by 10 and 100.

As the lesson progresses, students engage in various activities that involve multiplying numbers by 100, comparing the outcomes with the results of multiplying the same numbers by 10. They are presented with visual aids and calculations that illustrate the rule of multiplying by 100, which they are then asked to explain. The activities also include reasoning challenges, such as identifying incorrect representations of multiplication by 100 and solving problems related to real-world contexts, like calculating the perimeter of a rectangle. The lesson concludes with independent work where students are tasked with noticing patterns, using comparison symbols, and explaining their reasoning to deepen their understanding of the multiplication concept.