Fractions - Subtract fractions - Presentation

In a comprehensive set of teaching slides focused on subtracting fractions, students are guided through a series of activities designed to enhance their understanding of fraction subtraction. The lesson begins with a discussion on the rules for adding fractions with the same denominator and how this knowledge can be applied to subtraction. The first activity features a practical scenario where Malachi eats a chocolate bar, and students are tasked with filling in missing fractions to show the subtraction process. This activity not only reinforces the concept of subtracting fractions with like denominators but also contextualises the concept in a relatable situation.

Subsequent activities involve using visual models to aid in the subtraction of fractions. Students are encouraged to use these models to understand the subtraction process better and complete part-whole models to visualise the concept. The lesson includes reasoning tasks where students examine different approaches to subtracting fractions, such as finding the difference between two fractions. Additionally, creative reasoning challenges prompt students to generate multiple addition and subtraction calculations from a given model, encouraging flexibility in thinking. Independent work tasks further solidify the lesson's concepts, asking students to complete number sentences using bar models and their own drawings, and to find missing fractions with proof through representations. The lesson concludes with a discussion on different models of subtraction and how to represent these scenarios with number stories, enhancing the students' ability to conceptualise and articulate their understanding of subtracting fractions.