Reflection: Developing a Conceptual Understanding Subtracting Mixed Numbers - Section 3: Closure


As I reflect back over this lesson, I know that the students having to draw models today really helped them understand their answers.  Fractions, for some reason, are difficult for students to really understand.  Especially, the concept of keeping the same denominator.  We have modeled, and modeled, and modeled fractions for weeks now.  I know that the majority of the students understand why the denominator is not added or subtracted.  The models are the reason for this understanding.  We will continue to use modeling as we move into multiplying fractions.

  Developing a Conceptual Understanding: Modeling
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Subtracting Mixed Numbers

Unit 1: Fractions
Lesson 18 of 22

Objective: SWBAT subtract mixed numbers by drawing models and thinking about the relationship between addition and subtraction.

Big Idea: Students can use models to validate their answers to their subtraction problems of mixed numbers with like denominators.

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2 teachers like this lesson
Math, Fractions, Number Sense and Operations, mixed numbers, improper fractions, subtracting fractions
  50 minutes
mixed numbers
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