Multiplication and Division - Multiply by 100 - Presentation

The second lesson in a series on multiplication and division delves into the concept of multiplying by 100, expanding upon the understanding of multiplying by 10. Students are encouraged to predict how the knowledge of multiplying by 10 can be applied to multiplying by 100. The lesson includes a series of interactive activities, starting with a discussion about the Base 10 system and how it aids in visualising the multiplication process. Students are tasked with completing sentences that help them conceptualise the value of a square when multiplied by 100, understanding the equivalence in terms of tens and ones, and exploring practical applications of these multiplication skills.

Further activities guide students to compare the results of multiplying numbers by 10 and by 100, observing patterns and formulating rules based on their calculations. For instance, they notice that multiplying by 100 results in a number that is one hundred times larger than the original number, which is ten times the result of multiplying by 10. This concept is reinforced through problem-solving exercises and reasoning questions that challenge students to apply their understanding to real-world scenarios, such as converting measurements and calculating perimeters. The lesson culminates in independent work where students demonstrate their grasp of the topic by identifying patterns, comparing values, and justifying their reasoning, ensuring a comprehensive understanding of multiplying by 100.