Fractions - Subtract Mixed Numbers - Presentation

In the lesson on subtracting mixed numbers, students are encouraged to build upon their existing knowledge of subtracting fractions. The lesson starts with a discussion prompt, asking students to recall the two methods for adding mixed numbers and how these could be applied to subtraction. The teaching slides guide students through a series of structured activities. The first activity presents a step-by-step method for subtracting mixed numbers, using a visual representation to break down the process into manageable parts. Students are then provided with similar problems to solve, ensuring they grasp the concept and the method thoroughly.

Further into the lesson, a second activity introduces the use of a number line to find the difference between mixed numbers, offering an alternative strategy to the previous method. This visual approach helps students to conceptualise the subtraction process and understand the relationship between the numbers. The third activity involves solving subtraction problems and applying the learned methods to ensure a deep understanding. Reasoning tasks are also included to challenge students' comprehension, such as identifying mistakes in given calculations and explaining their reasoning, thus encouraging critical thinking. The lesson concludes with independent work, where students complete models to solve subtraction calculations, and a discussion on comparing fractions, simplifying answers, and preferred methods for subtracting fractions.