## Decomposing is... - Section 4: Practicing

Decomposing is...

# Using Decomposition As a Tool to Prove The Why Behind Simplifying

Unit 7: Fractions 2: Addition and Subtraction Concepts/ Mini unit
Lesson 2 of 8

## Big Idea: This introductory lesson to decomposition of fractions is a straightforward whole group instruction that teaches students the "why" behind the decomposition of fractions in addition and subtraction of mixed numbers.

Print Lesson
1 teacher likes this lesson
Standards:
Subject(s):
Math, Number Sense and Operations, Fractions, Decomposition of Fractions
45 minutes

### Mary Ellen Kanthack

##### Similar Lessons

###### Mixed Number Mystery
4th Grade Math » Operations with Fractions
Big Idea: Fractions operations
Favorites(8)
Resources(11)
Helena, MT
Environment: Suburban

###### Adding & Subtracting Fractions
4th Grade Math » Fractions
Big Idea: Students will use an interactive computer application to model the addition and subtraction of fractions.
Favorites(3)
Resources(34)
MT
Environment: Urban

###### Modeling Adding and Subtracting Mixed Numbers
4th Grade Math » Fractions
Big Idea: Adding and subtracting mixed numbers can be modeled by using shapes.
Favorites(18)
Resources(13)
Memphis, TN
Environment: Urban