Reflection: Adjustments to Practice Multiplying with Fractions - Section 2: Multiplying fractions using area models

 

The area model works very well for multiplying fractions by fractions and fractions by whole numbers.  What doesn't work so well is using the model to multiply mixed numbers... it's so complicated.

See youtube video

 

I watched this video to help me learn how to do it.  Although I understood how to do it, I felt that it would be way to complicated for the students to understand.  So, I practiced using area models when I could and then got the students to notice the algorithm.  Then when it came to mutliplying mixed numbers, I asked them how we could apply the algorithm (multiplying numerators, multiplying denominators) to these numbers.  I questioned them about having just numerators and denominators.  I had them looking at the numbers to decide what we had.  Finally, one student was able to tell me to change the mixed number into an improper fraction and then we wil have a numerator and a denominator only.  

  Using the area model and when to use the standard algorithm
  Adjustments to Practice: Using the area model and when to use the standard algorithm
Loading resource...
 

Multiplying with Fractions

Unit 4: Number Sense
Lesson 12 of 26

Objective: SWBAT multiply with fractions using models.

Big Idea: Students will use their understanding of multiplying fractions and apply it to dividing fractions which is a key component in common core.

  Print Lesson
6 teachers like this lesson
mh900340018
 
1
2
3
4
5
Similar Lessons
 
Pretest
6th Grade Math » Fraction Operations
Big Idea: What do students already know about fractions? What gaps do students have in their understanding? Students take the fractions pretest in order to inform instruction.
  Favorites(29)
  Resources(9)
Somerville, MA
Environment: Urban
Andrea Palmer
 
Expressing Fractions, Mixed Numbers, and Division Expression
5th Grade Math » Adding and Subtracting Fractions with Unlike Denominators
Big Idea: 0.25 is the same as 25/100. And ½ is the same as 5/10 is the same as .5
  Favorites(7)
  Resources(28)
Seattle, WA
Environment: Urban
James Ewing
 
Fraction Cover Up
5th Grade Math » Fractions
Big Idea: Students need to concrete models be able to see the exchange of fractions with unlike denominators.
  Favorites(1)
  Resources(14)
Scottsdale, AZ
Environment: Urban
Cathy Skinner
 
Something went wrong. See details for more info
Nothing to upload
details
close