2.  The students will add and subtract fractions with like denominators.  The students will simplify fractions.  The students will find least common denominators.  The students will find a common denominator to add and subtract fractions with unlike denominators.

3. 2.1 Numbers, Number Systems and Number Relationships  2.1.5.D Use models to represent fractions.  2.1.5.G Develop and apply number theory concepts to represent numbers in various ways. 2.2 Computation and Estimation  2.2.5.C Develop and apply algorithms to solve word problems that involve addition and/or subtraction with factions that include like and unlike denominators

5.  Copy the Denominator  Add the top

7. Are you ready to add and subtract fractions with common denominators?

8. If you can count by a number other than 1 to reach both parts of the fraction!

10. Time to Practice!!!!

11.  Make a list of multiples for each denominator.  Circle the common multiples.  What is the least common denominator???

12. Let’s practice finding the least common denominators!

13.  Set-up the Problem  Finding the

14.  Find the common denominator  Make equivalent fractions  Copy the denominator  Add the top

16. Are you up to the challenge???

17.  Slide 1 and 9 Math Mastery: Fractions. Math Mastery (2001). Retrieved November 4, 2008, from Discovery Education: http://streaming.discoveryeducation.com/http://streaming.discoveryeducation.com/  Slide 6 Example 1: Adding Fractions with a Common Denominator--Baking Cake. Discovery Channel School (2005). Retrieved November 4, 2008, from Discovery Education: http://streaming.discoveryeducation.com/http://streaming.discoveryeducation.com/  Slide 15 Example 3: Adding Fractions with Different Denominators--Serving Salsa. Discovery Channel School (2005). Retrieved November 4, 2008, from Discovery Education: http://streaming.discoveryeducation.com/http://streaming.discoveryeducation.com/