1. Math 801A: Mathematical Operations – Subtracting Fractions
Mathematics Essentials
March 7th, 2017

2. Lesson Introduction Today I will...
subtract fractions concretely, pictorially, and symbolically
subtract fractions in problem situations using the most appropriate method

3. Subtracting Fractions with Like Denominators
These are the easiest types of fractions to subtract
Subtract the numerators and keep the same denominator!

4. Subtracting Fractions with Unlike Denominators
Steps to take to solve problems with unlike denominators:
Draw a picture or use fraction strips
Find a “common denominator” - make the pictures have the same number of equal parts (same denominators)
Subtract the numerators and use the common denominator

5. Subtracting Fractions with Unlike Denominators
E.g
E.g _ _
E.g. 1 6

6. Simplifying/Reducing Fractions

7. Common Denominator – Butterfly Solution

8. Mixed Numbers

9. Homework! Greatest Common Factor Worksheet.
Adding/Subtracting Fractions Assignment (pg. 40 all).