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:
- If the numerator is much smaller than the denominator, then the result will be 0.
- If the numerator is about one half of the denominator, then the result will be 1/2.
- 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.