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

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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
• Are numbers expressed as the ratio of two numbers
Numerator
• Tells the desired outcome
Denominator
• Tells you how many things are there in total
Improper Fraction
• 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

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]