STANDARDS
CCSS.MATH.CONTENT.4.NF.B.3
Understand a fraction a/b with a > 1 as a sum of fractions 1/b.
CCSS.MATH.CONTENT.4.NF.B.3.C
Add and subtract mixed numbers with like denominators, e.g., by replacing each mixed number with an equivalent fraction, and/or by using properties of operations and the relationship between addition and subtraction.
LESSON TIME
20-30 minutes
SUMMARY
This lesson for Grades 4-5 uses doughnuts to illustrate adding fractions with like denominators and takes students through the steps of adding mixed number fractions that also have like denominators. You can view and download the “Doughnuts and Adding Fractions” PowerPoint presentation and PDF below.
TECHNOLOGY REQUIRED
Display slides using a projector and computer. For blended learning, you can use this lesson in Google Classroom or similar online meeting platform.
RELATED
This lesson can be combined with these two lesson PowerPoints: Adding with Like Denominators Part 1 and 2.
VIDEO: Adding Like Fractions
How do you add like fractions? This quick video from our game Fish Lake has simple examples of comparing fractions and fraction addition.
GAMES: Fish Lake
Play Fish Lake for about 30 minutes per session throughout your fractions units to practice working with fractions. Fish Lake is a great game to get students started with in fractions as it covers fraction standards in the following: comparisons, addition, subtraction, multiplication, division, and word problems. The exercises cover single and mixed fractions and like and unlike denominators.
POWERPOINT: Adding Fractions with Like Denominators
This lesson slideshow teaches the definition of like denominators, whole numbers, mixed numbers, and fraction addition. Problem-solving methods are also included with relevant examples. Click the links below to download the PPT and the PDF for the lesson slideshow.
