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Welcome to my math blog! The purpose of this blog is to help you stay informed about our learning and experiences that have taken place during our math class. I have also included links your child (and you) may want to use in order to supplement math learning in 5th grade.

Monday, October 24, 2016

Adding and Subtracting Mixed Numbers

Lesson Frame:

  • We will add and subtract mixed numbers.
  • I will add and subtract mixed numbers.

Interactive Notebook

Today we added three pages to our journal:
  • Changing Mixed Numbers to Improper Fractions
  • Changing Improper Fractions to Mixed Numbers
  • Adding/Subtracting Mixed Numbers

When teaching changing mixed numbers to improper fractions, I use MAD (Multiply, Add, Denominator):

There isn't any fun kind of mnemonic device... just divide!

When working through adding and subtracting mixed numbers, I used templates 12 and 14 from:

In the process of adding and subtracting mixed numbers, we included the following steps:
  • Creating equivalent fractions to create common denominators
  • We converted mixed numbers to improper fractions.
  • We may have needed to use the Butterfly method.
  • We converted improper backed to mix.
  • We looked at our mixed numbers to determine if we could simplify, which included using
    • divisibility rules
    • prime numbers and multiples
    • common factors.
Think Through Math

With the remaining 15 minutes in each class, we spent time on Think Through Math.

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