Unit 2, Lesson 3# Mixed Numbers

Massachusetts Department of Elementary and Secondary Education 60 min(s)

Understand how to decompose a fraction into a sum of fractions with the same denominator in more than one way, recording each decomposition by an equation, and how to justify these decompositions, e.g., by using a visual fraction model. Handout on Mixed NumbersIndex cards or Mixed Number and Fraction matching cards. This lesson extends the understanding of operations with unit fractions to mixed numbers; it reinforces the concept of a whole being equal to any fraction. Students use composition and decomposition of unit fractions as well as equivalent fractions to understand and manipulate mixed numbers. Justify decompositions, e.g., by using a visual fraction model.