Fractions - Subtract 2 Fractions- Presentation

In this engaging lesson, students delve deeper into the concept of subtracting fractions. They begin by recalling the three structures of subtraction and providing examples of each using fractions. The lesson includes a variety of interactive activities to strengthen their understanding. Activity 1 invites learners to use paper strips divided into eighths to visually solve subtraction problems involving eighths. This hands-on approach helps them to concretely see the difference when subtracting fractions such as 7/8 - 1/8 and 11/8 - 7/8, leading to answers like 6/8 and 4/8, respectively.

Building on this, Activity 2 incorporates bar models to aid in the subtraction of fractions. Students are encouraged to use these visual aids to subtract fractions such as 11/8 - 2/8 and 15/6 - 12/6, resulting in answers like 9/8 and 3/6. In Activity 3, a number line is used to further support the understanding of fraction subtraction, with examples like 15/10 - 7/10. The lesson also includes reasoning tasks where students match number stories to calculations, and explore various methods to solve subtraction problems. The independent work section challenges students to apply their knowledge and skills to subtract fractions using bar models and to solve word problems. The discussion prompts encourage students to reflect on the strategies they've used, such as 'take away' or finding the 'difference', and to consider how they can find missing numbers in subtraction by counting on or partitioning fractions.