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## Adding, Subtracting, Multiplying, and Dividing Fractions

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**Adding, Subtracting, Multiplying, and Dividing Fractions**By: Mr. Menjivar**09/02/11**09/02/11 Observe, Question, Comment Add, Subtract, Multiply, and Divide Fractions Add, Subtract, Multiply, and Divide Fractions Reflection Warm-Up: 8L 8R**Warm-Up**Change the Improper Fraction to Mixed Number #1) #2) Change the Mixed Number to Improper Fraction #3) #4)**09/02/11**09/02/11 Observe, Question, Comment Add, Subtract, Multiply, and Divide Fractions Add, Subtract, Multiply, and Divide Fractions Reflection Warm-Up: Standard 8L 8R**Standard**• Number Sense 2.2:Add and subtract fractions by using factoring to find common denominators. • Number Sense 1.2:Add, subtract, multiply, and divide rational numbers (fractions).**09/02/11**09/02/11 Observe, Question, Comment Add, Subtract, Multiply, and Divide Fractions Add, Subtract, Multiply, and Divide Fractions Reflection Warm-Up: Standard Objective 8L 8R**Objective**• To add and subtract fractions • To multiply and divide fractions**09/02/11**09/02/11 Observe, Question, Comment Add, Subtract, Multiply, and Divide Fractions Add, Subtract, Multiply, and Divide Fractions Reflection Warm-Up: Standard Objective Vocabulary 8L 8R**Fraction**• Your Definition: • Are numbers expressed as the ratio of two numbers**Numerator**• Your Definition: • Tells the desired outcome**Denominator**• Your Definition: • Tells you how many things are there in total**Improper Fraction**• Your Definition: • They’re fractions where the numerator is bigger than the denominator.**09/02/11**09/02/11 Observe, Question, Comment Add, Subtract, Multiply, and Divide Fractions Add, Subtract, Multiply, and Divide Fractions Reflection Warm-Up: Standard Objective Vocabulary Notes/Examples 8L 8R**Fractions**There are a few “special” fractions How do you write 7 as a fraction? 7 1 How do you write 1 as a fraction? 3 101 3 101 How do you write 0 as a fraction? 0 0 5 100**Let’s apply them… :-)**• (Use GCF if lost…)**09/02/11**09/02/11 Observe, Question, Comment Add, Subtract, Multiply, and Divide Fractions Add, Subtract, Multiply, and Divide Fractions Reflection Warm-Up: Standard Objective Classwork #1 Vocabulary Notes/Examples 8L 8R**Try these on your own =)**1.) 4.) 2.) 5.) 3.)**09/02/11**09/02/11 Observe, Question, Comment Add, Subtract, Multiply, and Divide Fractions Add, Subtract, Multiply, and Divide Fractions Reflection Warm-Up: Standard Objective Classwork #1 Vocabulary Notes/Examples Back To The NOTES!!!!!!!!!!!!! 8L 8R**What if the denominators are different?**• Step 1: Get a Common Denominator**What if the denominators are different?**• Step 2: Make the denominators the same**What if the denominators are different?**• Step 3: Change numerators accordingly**What if the denominators are different?**• Step 4: Perform necessary operation**Word Problem**• Suppose one day you rode a bicycle for hours and jogged for hours. How many hours did you exercise?**BrainPop**• Adding and Subtracting**09/02/11**09/02/11 Observe, Question, Comment Add, Subtract, Multiply, and Divide Fractions Add, Subtract, Multiply, and Divide Fractions Reflection Warm-Up: Standard Objective Classwork #1 Classwork #2 Vocabulary Notes/Examples 8L 8R**09/02/11**09/02/11 Observe, Question, Comment Add, Subtract, Multiply, and Divide Fractions Add, Subtract, Multiply, and Divide Fractions Reflection Warm-Up: Standard Objective Classwork #1 Classwork #2 Vocabulary Homework Notes/Examples 8L 8R**Homework**• Pg. 313 [1-6 all and 13-16 all] • Pg. 314 [1-11 all]**Multiplying Fractions**All you do is multiply straight across!**Dividing Fractions**Dividing is just like multiplying… EXCEPT!!! You are going to multiply the first fraction by the reciprocal of the second fraction.**Dividing Fractions**What is a reciprocal? It is the flipped version of a fraction. The reciprocal of 4 5 5 4**BrainPop Multiplying and Dividing Fractions**• Break Time!**09/01/11**09/01/11 Observe, Question, Comment Add, Subtract, Multiply, and Divide Fractions Add, Subtract, Multiply, and Divide Fractions Reflection Warm-Up: Standard Classwork Objective Vocabulary Notes/Examples 8L 8R**09/01/11**09/01/11 Observe, Question, Comment Add, Subtract, Multiply, and Divide Fractions Add, Subtract, Multiply, and Divide Fractions Reflection Warm-Up: Standard Classwork Objective Homework: Vocabulary Notes/Examples 8L 8R**Homework**• Pg. 315 [1-8 all and 11-17 all and 21-23]