Lesson Plan

Subtract fractions with unlike denominators by using area models

  • Created by:
  • Standards:
  • Tags:
teaches Common Core State Standards CCSS.Math.Content.5.NF.A.1 http://corestandards.org/Math/Content/5/NF/A/1
teaches Common Core State Standards CCSS.Math.Content.5.NF.A.2 http://corestandards.org/Math/Content/5/NF/A/2
teaches Common Core State Standards CCSS.Math.Practice.MP1 http://corestandards.org/Math/Practice/MP1
teaches Common Core State Standards CCSS.Math.Practice.MP2 http://corestandards.org/Math/Practice/MP2
teaches Common Core State Standards CCSS.Math.Practice.MP4 http://corestandards.org/Math/Practice/MP4
Quick assign
Preview assignment >

You have saved this lesson!

Here's where you can access your saved items.

Dismiss
Content placeholder

Card of

  1. Begin lesson Begin assignment

Tip: swipe on touch devices, use your keyboard's ← and → arrow keys, or clicker buttons to quickly navigate the lesson plan

or to view additional materials

You'll gain access to interventions, extensions, task implementation guides, and more for this lesson.

Big Ideas: Because fractions are representations of equal parts, they can only be added or subtracted when those parts are of the same size or value. This lesson builds on students' work with subtracting fractions with like denominators. This task uses a discussion about sugar content in food and drink. Students determine how much more sugar one item has than another by subtracting fractions with unlike denominators. The mathematical concept in this lesson builds toward future use in solving ratio, rate, and proportion problems, and prepares students for work with greatest common factors and least common multiples in 6th grade algebra. Vocabulary: area model, numerator, unlike and like denominator, vertical, horizontal, teaspoons Special Materials: Colored pencils (optional) Teaspoon (optional) Measuring cups (optional) Sugar (optional)
Provide feedback