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Fun with FractionS !. Objectives. 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. - PowerPoint PPT Presentation

Adding Fractions with Different Denominators

Fun with FractionS!

ObjectivesThe 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.Standards2.1 Numbers, Number Systems and Number Relationships2.1.5.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 Estimation2.2.5.C Develop and apply algorithms to solve word problems that involve addition and/or subtraction with factions that include like and unlike denominators

Adding and Subtracting Fractions with Like Denominators Copy the Denominator

Add the top

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

Test of Simplifying FractionsIf you can count by a number other than 1 to reach both parts of the fraction!

Time to Practice!!!!

Finding Least Common DenominatorsMake a list of multiples for each denominator.

Circle the common multiples.

What is the least common denominator???Lets practice finding the least common denominators!Steps to Adding and Subtracting FractionsSet-up the ProblemFinding the

Adding and Subtracting Fractions with Unlike DenominatorsFind the common denominator

Make equivalent fractions

Copy the denominator

Add the top

Are you up

to the

challenge???

ReferencesSlide 1 and 9 Math Mastery: Fractions. Math Mastery(2001). Retrieved November 4, 2008, fromDiscovery Education: http://streaming.discoveryeducation.com/

Slide 6Example 1: Adding Fractions with a Common Denominator--Baking Cake. Discovery Channel School(2005). Retrieved November 4, 2008, fromDiscovery Education: http://streaming.discoveryeducation.com/

Slide 15Example 3: Adding Fractions with Different Denominators--Serving Salsa. Discovery Channel School(2005). Retrieved November 4, 2008, fromDiscovery Education: http://streaming.discoveryeducation.com/