FUN WITH FRACTIONS!
Dec 29, 2015
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.
Standards2.1 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
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 Fractions
If you can count by a number other than 1 to reach both parts of
the fraction!
Time to Practice!!!!
Finding Least Common
Denominators Make a list of multiples for each
denominator.
Circle the common multiples.
What is the least common denominator???
Let’s practice finding the
least common denominators!
Steps to Adding and Subtracting Fractions
Set-up the Problem Finding the
Adding and Subtracting Fractions with Unlike
Denominators Find the common denominator
Make equivalent fractions
Copy the denominator
Add the top
Are you up
to the
challenge???
References
Slide 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/