## Reflection: Modeling Modeling Addition and Subtraction of Mixed Numbers - Section 4: Independent Closing

Because there are those magical moments that spark student’s attention, and pull them deeper into the intentions of this lesson, I always want to add the right problem solving ingredients that are essential to delivering this lesson effectively.  I make sure that students know exactly why I am teaching this lesson, and I model how the students should interact as they participating in solving the given set of mathematical problems.

A fraction with a numerator of one is called a unit fraction. When students investigate fractions other than unit fractions, such as 2/3, they should be able to join (compose) or separate (decompose) the fractions of the same whole.

Modeling: Teacher's Model

# Modeling Addition and Subtraction of Mixed Numbers

Unit 3: Number & Operations-Fractions
Lesson 9 of 21

## Big Idea: Given a set of mixed fractions students will be able to show different ways of adding and subtracting mixed numbers using models.

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Standards:
Subject(s):
Math, addition, subtraction, mixed fractions, explaining
57 minutes

### Carol Redfield

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