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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:. 8 L. 8 R. Warm-Up.

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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
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
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
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
Fraction

  • Your Definition:

  • Are numbers expressed as the ratio of two numbers


Numerator
Numerator

  • Your Definition:

  • Tells the desired outcome


Denominator
Denominator

  • Your Definition:

  • Tells you how many things are there in total


Improper fraction
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
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
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
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
What if the denominators are different?

  • Step 1: Get a Common Denominator


What if the denominators are different1
What if the denominators are different?

  • Step 2: Make the denominators the same


What if the denominators are different2
What if the denominators are different?

  • Step 3: Change numerators accordingly


What if the denominators are different3
What if the denominators are different?

  • Step 4: Perform necessary operation


Parallel example teacher left student right
Parallel ExampleTeacher (left) ; Student (right)


Parallel example teacher left student right1
Parallel ExampleTeacher (left) ; Student (right)



Word problem
Word Problem

  • Suppose one day you rode a bicycle for hours and jogged for hours. How many hours did you exercise?


Brainpop
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
Homework

  • Pg. 313 [1-6 all and 13-16 all]

  • Pg. 314 [1-11 all]



Multiplying fractions
Multiplying Fractions

All you do is multiply straight across!


Parallel example teacher left student right2
Parallel ExampleTeacher (left) ; Student (right)


Parallel example teacher left student right3
Parallel ExampleTeacher (left) ; Student (right)


Dividing fractions
Dividing Fractions

Dividing is just like multiplying…

EXCEPT!!!

You are going to multiply the first fraction by the reciprocal of the second fraction.


Dividing fractions1
Dividing Fractions

What is a reciprocal?

It is the flipped version of a fraction.

The reciprocal of

4 5

5 4


Lets take the reciprocal of each number
Lets Take The ReciprocalOf Each Number

  • 5



Parallel example teacher left student right4
Parallel ExampleTeacher (left) ; Student (right)


Parallel example teacher left student right5
Parallel ExampleTeacher (left) ; Student (right)


Brainpop multiplying and dividing fractions
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


Homework1
Homework

  • Pg. 315 [1-8 all and 11-17 all and 21-23]



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