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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.

Thursday, October 6, 2016

Estimating Sums and Differences of Fractions: Notes

Today we began working with estimating the sums and differences of fractions.  We started by using a fraction number sense page from "Common Core Math Interactive Notebook:  Numbers and Operations:  Fractions" by Jennifer Findley.  Basically, there is a page where we can create a foldable that allows us to look at fractions to determine if they are closer to 0, 1/2, or 1.

I also found a website that had a plethora of activities that went right along with this topic and included estimating both fractions and mixed numbers.  The site is called Math Worksheets Island.  What I liked from this was that it laid out three rules to use when estimating sums and differences:

  1. If the numerator is much smaller than the denominator, then the result will be 0.
  2. If the numerator is about one half of the denominator, then the result will be 1/2.
  3. If the numerator and denominator are close to each other, then the result will be 1.
I combined both of these ideas into one foldable.  Then we began practicing estimating sums and differences with fractions.

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