Home » Mathematics » Basic Math » Dividing Fractions and Mixed Numbers

Mary Pyo

Mary Pyo

Dividing Fractions and Mixed Numbers

Slide Duration:

Table of Contents

Section 1: Algebra and Decimals
Expressions and Variables

5m 57s

Intro
0:00
Vocabulary
0:06
Variable
0:09
Expression
0:48
Numerical Expression
1:08
Algebraic Expression
1:35
Word Expression
2:04
Extra Example 1: Evaluate the Expression
2:27
Extra Example 2: Evaluate the Expression
3:16
Extra Example 3: Evaluate the Expression
4:04
Extra Example 4: Evaluate the Expression
4:59
Exponents

5m 34s

Intro
0:00
What Exponents Mean
0:07
Example: Ten Squared
0:08
Extra Example 1: Exponents
0:50
Extra Example 2: Write in Exponent Form
1:58
Extra Example 3: Using Exponent and Base
2:37
Extra Example 4: Write the Equal Factors
4:26
Order of Operations

8m 40s

Intro
0:00
Please Excuse My Dear Aunt Sally
0:07
Step 1: Parenthesis
1:16
Step 2: Exponent
1:25
Step 3: Multiply and Divide
1:30
Step 4: Add and Subtract
2:00
Example: Please Excuse My Dear Aunt Sally
2:26
Extra Example 1: Evaluating Expression
3:37
Extra Example 2: Evaluating Expression
4:59
Extra Example 3: Evaluating Expression
5:34
Extra Example 4: Evaluating Expression
6:25
Comparing and Ordering Decimals

13m 37s

Intro
0:00
Place Value
0:13
Examples: 1,234,567.89
0:19
Which is the Larger Value?
1:33
Which is Larger: 10.5 or 100.5
1:46
Which is Larger: 1.01 or 1.10
2:24
Which is Larger: 44.40 or 44.4
4:20
Which is Larger: 18.6 or 16.8
5:18
Extra Example 1: Order from Least to Greatest
5:55
Extra Example 2: Order from Least to Greatest
7:56
Extra Example 3: Order from Least to Greatest
9:16
Extra Example 4: Order from Least to Greatest
10:42
Rounding Decimals

12m 31s

Intro
0:00
Decimal Place Value
0:06
Example: 12,3454.6789
0:07
How to Round Decimals
1:17
Example: Rounding 1,234.567
1:18
Extra Example 1: Rounding Decimals
3:47
Extra Example 2: Rounding Decimals
6:10
Extra Example 3: Rounding Decimals
7:45
Extra Example 4: Rounding Decimals
9:56
Adding and Subtracting Decimals

11m 30s

Intro
0:00
When Adding and Subtracting
0:06
Align the Decimal Point First
0:12
Add or Subtract the Digits
0:47
Place the Decimal Point in the Same Place
0:55
Check by Estimating
1:09
Examples
1:28
Add: 3.45 + 7 + 0.835
1:30
Find the Difference: 351.4 - 65.25
3:34
Extra Example 1: Adding Decimals
5:32
Extra Example 2: How Much Money?
6:09
Extra Example 3: Subtracting Decimals
7:20
Extra Example 4: Adding Decimals
9:32
Multiplying Decimals

10m 30s

Intro
0:00
Multiply the Decimals
0:05
Methods for Multiplying Decimals
0:06
Example: 1.1 x 6
0:38
Extra Example 1: Multiplying Decimals
1:51
Extra Example 2: Work Money
2:49
Extra Example 3: Multiplying Decimals
5:45
Extra Example 4: Multiplying Decimals
7:46
Dividing Decimals

17m 49s

Intro
0:00
When Dividing Decimals
0:06
Methods for Dividing Decimals
0:07
Divisor and Dividend
0:37
Example: 0.2 Divided by 10
1:35
Extra Example 1 : Dividing Decimals
5:24
Extra Example 2: How Much Does Each CD Cost?
8:22
Extra Example 3: Dividing Decimals
10:59
Extra Example 4: Dividing Decimals
12:08
Section 2: Number Relationships and Fractions
Prime Factorization

7m

Intro
0:00
Terms to Review
0:07
Prime vs. Composite
0:12
Factor
0:54
Product
1:15
Factor Tree
1:39
Example: Prime Factorization
2:01
Example: Prime Factorization
2:43
Extra Example 1: Prime Factorization
4:08
Extra Example 2: Prime Factorization
5:05
Extra Example 3: Prime Factorization
5:33
Extra Example 4: Prime Factorization
6:13
Greatest Common Factor

12m 47s

Intro
0:00
Terms to Review
0:05
Factor
0:07
Example: Factor of 20
0:18
Two Methods
0:59
Greatest Common Factor
1:00
Method 1: GCF of 15 and 30
1:37
Method 2: GCF of 15 and 30
2:58
Extra Example 1: Find the GCF of 6 and 18
5:16
Extra Example 2: Find the GCF of 36 and 27
7:43
Extra Example 3: Find the GCF of 6 and 18
9:18
Extra Example 4: Find the GCF of 54 and 36
10:30
Fraction Concepts and Simplest Form

10m 3s

Intro
0:00
Fraction Concept
0:10
Example: Birthday Cake
0:28
Example: Chocolate Bar
2:10
Simples Form
3:38
Example: Simplifying 4 out of 8
3:46
Extra Example 1: Graphically Show 4 out of 10
4:41
Extra Example 2: Finding Fraction Shown by Illustration
5:10
Extra Example 3: Simplest Form of 5 over 25
7:02
Extra Example 4: Simplest Form of 14 over 49
8:30
Least Common Multiple

14m 16s

Intro
0:00
Term to Review
0:06
Multiple
0:07
Example: Multiples of 4
0:15
Two Methods
0:41
Least Common Multiples
0:44
Method 1: LCM of 6 and 10
1:09
Method 2: LCM of 6 and 10
2:56
Extra Example 1: LCM of 12 and 15
5:09
Extra Example 2: LCM of 16 and 20
7:36
Extra Example 3 : LCM of 15 and 25
10:00
Extra Example 4 : LCM of 12 and 18
11:27
Comparing and Ordering Fractions

13m 10s

Intro
0:00
Terms Review
0:14
Greater Than
0:16
Less Than
0:40
Compare the Fractions
1:00
Example: Comparing 2/4 and 3/4
1:08
Example: Comparing 5/8 and 2/5
2:04
Extra Example 1: Compare the Fractions
3:28
Extra Example 2: Compare the Fractions
6:06
Extra Example 3: Compare the Fractions
8:01
Extra Example 4: Least to Greatest
9:37
Mixed Numbers and Improper Fractions

12m 49s

Intro
0:00
Fractions
0:10
Mixed Number
0:21
Proper Fraction
0:47
Improper Fraction
1:30
Switching Between
2:47
Mixed Number to Improper Fraction
2:53
Improper Fraction to Mixed Number
4:41
Examples: Switching Fractions
6:37
Extra Example 1: Mixed Number to Improper Fraction
8:57
Extra Example 2: Improper Fraction to Mixed Number
9:37
Extra Example 3: Improper Fraction to Mixed Number
10:21
Extra Example 4: Mixed Number to Improper Fraction
11:31
Connecting Decimals and Fractions

15m 1s

Intro
0:00
Examples: Decimals and Fractions
0:06
More Examples: Decimals and Fractions
2:48
Extra Example 1: Converting Decimal to Fraction
6:55
Extra Example 2: Converting Fraction to Decimal
8:45
Extra Example 3: Converting Decimal to Fraction
10:28
Extra Example 4: Converting Fraction to Decimal
11:42
Section 3: Fractions and Their Operations
Adding and Subtracting Fractions with Same Denominators

5m 17s

Intro
0:00
Same Denominator
0:11
Numerator and Denominator
0:18
Example: 2/6 + 5/6
0:41
Extra Example 1: Add or Subtract the Fractions
2:02
Extra Example 2: Add or Subtract the Fractions
2:45
Extra Example 3: Add or Subtract the Fractions
3:17
Extra Example 4: Add or Subtract the Fractions
4:05
Adding and Subtracting Fractions with Different Denominators

23m 8s

Intro
0:00
Least Common Multiple
0:12
LCM of 6 and 4
0:31
From LCM to LCD
2:25
Example: Adding 1/6 with 3/4
3:12
Extra Example 1: Add or Subtract
6:23
Extra Example 2: Add or Subtract
9:49
Extra Example 3: Add or Subtract
14:54
Extra Example 4: Add or Subtract
18:14
Adding and Subtracting Mixed Numbers

19m 44s

Intro
0:00
Example
0:05
Adding Mixed Numbers
0:17
Extra Example 1: Adding Mixed Numbers
1:57
Extra Example 2: Subtracting Mixed Numbers
8:13
Extra Example 3: Adding Mixed Numbers
12:01
Extra Example 4: Subtracting Mixed Numbers
14:54
Multiplying Fractions and Mixed Numbers

21m 32s

Intro
0:00
Multiplying Fractions
0:07
Step 1: Change Mixed Numbers to Improper Fractions
0:08
Step2: Multiply the Numerators Together
0:56
Step3: Multiply the Denominators Together
1:03
Extra Example 1: Multiplying Fractions
1:37
Extra Example 2: Multiplying Fractions
6:39
Extra Example 3: Multiplying Fractions
10:20
Extra Example 4: Multiplying Fractions
13:47
Dividing Fractions and Mixed Numbers

18m

Intro
0:00
Dividing Fractions
0:09
Step 1: Change Mixed Numbers to Improper Fractions
0:15
Step 2: Flip the Second Fraction
0:27
Step 3: Multiply the Fractions
0:52
Extra Example 1: Dividing Fractions
1:23
Extra Example 2: Dividing Fractions
5:06
Extra Example 3: Dividing Fractions
9:34
Extra Example 4: Dividing Fractions
12:06
Distributive Property

11m 5s

Intro
0:00
Distributive Property
0:06
Methods of Distributive Property
0:07
Example: a(b)
0:35
Example: a(b+c)
0:49
Example: a(b+c+d)
1:22
Extra Example 1: Using Distributive Property
1:56
Extra Example 2: Using Distributive Property
4:36
Extra Example 3: Using Distributive Property
6:39
Extra Example 4: Using Distributive Property
8:19
Units of Measure

16m 36s

Intro
0:00
Length
0:05
Feet, Inches, Yard, and Mile
0:20
Millimeters, Centimeters, and Meters
0:43
Mass
2:57
Pounds, Ounces, and Tons
3:03
Grams and Kilograms
3:38
Liquid
4:11
Gallons, Quarts, Pints, and Cups
4:14
Extra Example 1: Converting Units
7:02
Extra Example 2: Converting Units
9:31
Extra Example 3: Converting Units
12:21
Extra Example 4: Converting Units
14:05
Section 4: Positive and Negative Numbers
Integers and the Number Line

13m 24s

Intro
0:00
What are Integers
0:06
Integers are all Whole Numbers and Their Opposites
0:09
Absolute Value
2:35
Extra Example 1: Compare the Integers
4:36
Extra Example 2: Writing Integers
9:24
Extra Example 3: Opposite Integer
10:38
Extra Example 4: Absolute Value
11:27
Adding Integers

16m 5s

Intro
0:00
Using a Number Line
0:04
Example: 4 + (-2)
0:14
Example: 5 + (-8)
1:50
How to Add Integers
3:00
Opposites Add to Zero
3:10
Adding Same Sign Numbers
3:37
Adding Opposite Signs Numbers
4:44
Extra Example 1: Add the Integers
8:21
Extra Example 2: Find the Sum
10:33
Extra Example 3: Find the Value
11:37
Extra Example 4: Add the Integers
13:10
Subtracting Integers

15m 25s

Intro
0:00
How to Subtract Integers
0:06
Two-dash Rule
0:16
Example: 3 - 5
0:44
Example: 3 - (-5)
1:12
Example: -3 - 5
1:39
Extra Example 1: Rewrite Subtraction to Addition
4:43
Extra Example 2: Find the Difference
7:59
Extra Example 3: Find the Difference
9:08
Extra Example 4: Evaluate
10:38
Multiplying Integers

7m 33s

Intro
0:00
When Multiplying Integers
0:05
If One Number is Negative
0:06
If Both Numbers are Negative
0:18
Examples: Multiplying Integers
0:53
Extra Example 1: Multiplying Integers
1:27
Extra Example 2: Multiplying Integers
2:43
Extra Example 3: Multiplying Integers
3:13
Extra Example 4: Multiplying Integers
3:51
Dividing Integers

6m 42s

Intro
0:00
When Dividing Integers
0:05
Rules for Dividing Integers
0:41
Extra Example 1: Dividing Integers
1:01
Extra Example 2: Dividing Integers
1:51
Extra Example 3: Dividing Integers
2:21
Extra Example 4: Dividing Integers
3:18
Integers and Order of Operations

11m 9s

Intro
0:00
Combining Operations
0:21
Solve Using the Order of Operations
0:22
Extra Example 1: Evaluate
1:18
Extra Example 2: Evaluate
4:20
Extra Example 3: Evaluate
6:33
Extra Example 4: Evaluate
8:13
Section 5: Solving Equations
Writing Expressions

9m 15s

Intro
0:00
Operation as Words
0:05
Operation as Words
0:06
Extra Example 1: Write Each as an Expression
2:09
Extra Example 2: Write Each as an Expression
4:27
Extra Example 3: Write Each Expression Using Words
6:45
Writing Equations

18m 3s

Intro
0:00
Equation
0:05
Definition of Equation
0:06
Examples of Equation
0:58
Operations as Words
1:39
Operations as Words
1:40
Extra Example 1: Write Each as an Equation
3:07
Extra Example 2: Write Each as an Equation
6:19
Extra Example 3: Write Each as an Equation
10:08
Extra Example 4: Determine if the Equation is True or False
13:38
Solving Addition and Subtraction Equations

24m 53s

Intro
0:00
Solving Equations
0:08
inverse Operation of Addition and Subtraction
0:09
Extra Example 1: Solve Each Equation Using Mental Math
4:15
Extra Example 2: Use Inverse Operations to Solve Each Equation
5:44
Extra Example 3: Solve Each Equation
14:51
Extra Example 4: Translate Each to an Equation and Solve
19:57
Solving Multiplication Equation

19m 46s

Intro
0:00
Multiplication Equations
0:08
Inverse Operation of Multiplication
0:09
Extra Example 1: Use Mental Math to Solve Each Equation
3:54
Extra Example 2: Use Inverse Operations to Solve Each Equation
5:55
Extra Example 3: Is -2 a Solution of Each Equation?
12:48
Extra Example 4: Solve Each Equation
15:42
Solving Division Equation

17m 58s

Intro
0:00
Division Equations
0:05
Inverse Operation of Division
0:06
Extra Example 1: Use Mental Math to Solve Each Equation
0:39
Extra Example 2: Use Inverse Operations to Solve Each Equation
2:14
Extra Example 3: Is -6 a Solution of Each Equation?
9:53
Extra Example 4: Solve Each Equation
11:50
Section 6: Ratios and Proportions
Ratio

40m 21s

Intro
0:00
Ratio
0:05
Definition of Ratio
0:06
Examples of Ratio
0:18
Rate
2:19
Definition of Rate
2:20
Unit Rate
3:38
Example: $10 / 20 pieces
5:05
Converting Rates
6:46
Example: Converting Rates
6:47
Extra Example 1: Write in Simplest Form
16:22
Extra Example 2: Find the Ratio
20:53
Extra Example 3: Find the Unit Rate
22:56
Extra Example 4: Convert the Unit
26:34
Solving Proportions

17m 22s

Intro
0:00
Proportions
0:05
An Equality of Two Ratios
0:06
Cross Products
1:00
Extra Example 1: Find Two Equivalent Ratios for Each
3:21
Extra Example 2: Use Mental Math to Solve the Proportion
5:52
Extra Example 3: Tell Whether the Two Ratios Form a Proportion
8:21
Extra Example 4: Solve the Proportion
13:26
Writing Proportions

22m 1s

Intro
0:00
Writing Proportions
0:08
Introduction to Writing Proportions and Example
0:10
Extra Example 1: Write a Proportion and Solve
5:54
Extra Example 2: Write a Proportion and Solve
11:19
Extra Example 3: Write a Proportion for Word Problem
17:29
Similar Polygons

16m 31s

Intro
0:00
Similar Polygons
0:05
Definition of Similar Polygons
0:06
Corresponding Sides are Proportional
2:14
Extra Example 1: Write a Proportion and Find the Value of Similar Triangles
4:26
Extra Example 2: Write a Proportional to Find the Value of x
7:04
Extra Example 3: Write a Proportion for the Similar Polygons and Solve
9:04
Extra Example 4: Word Problem and Similar Polygons
11:03
Scale Drawings

13m 43s

Intro
0:00
Scale Drawing
0:05
Definition of a Scale Drawing
0:06
Example: Scale Drawings
1:00
Extra Example 1: Scale Drawing
4:50
Extra Example 2: Scale Drawing
7:02
Extra Example 3: Scale Drawing
9:34
Probability

11m 51s

Intro
0:00
Probability
0:05
Introduction to Probability
0:06
Example: Probability
1:22
Extra Example 1: What is the Probability of Landing on Orange?
3:26
Extra Example 2: What is the Probability of Rolling a 5?
5:02
Extra Example 3: What is the Probability that the Marble will be Red?
7:40
Extra Example 4: What is the Probability that the Student will be a Girl?
9:43
Section 7: Percents
Percents, Fractions, and Decimals

35m 5s

Intro
0:00
Percents
0:06
Changing Percent to a Fraction
0:07
Changing Percent to a Decimal
1:54
Fractions
4:17
Changing Fraction to Decimal
4:18
Changing Fraction to Percent
7:50
Decimals
10:10
Changing Decimal to Fraction
10:11
Changing Decimal to Percent
12:07
Extra Example 1: Write Each Percent as a Fraction in Simplest Form
13:29
Extra Example 2: Write Each as a Decimal
17:09
Extra Example 3: Write Each Fraction as a Percent
22:45
Extra Example 4: Complete the Table
29:17
Finding a Percent of a Number

28m 18s

Intro
0:00
Percent of a Number
0:06
Translate Sentence into an Equation
0:07
Example: 30% of 100 is What Number?
1:05
Extra Example 1: Finding a Percent of a Number
7:12
Extra Example 2: Finding a Percent of a Number
15:56
Extra Example 3: Finding a Percent of a Number
19:14
Extra Example 4: Finding a Percent of a Number
24:26
Solving Percent Problems

32m 31s

Intro
0:00
Solving Percent Problems
0:06
Translate the Sentence into an Equation
0:07
Extra Example 1: Solving Percent Problems
0:56
Extra Example 2: Solving Percent Problems
14:49
Extra Example 3: Solving Percent Problems
23:44
Simple Interest

27m 9s

Intro
0:00
Simple Interest
0:05
Principal
0:06
Interest & Interest Rate
0:41
Simple Interest
1:43
Simple Interest Formula
2:23
Simple Interest Formula: I = prt
2:24
Extra Example 1: Finding Simple Interest
3:53
Extra Example 2: Finding Simple Interest
8:08
Extra Example 3: Finding Simple Interest
12:02
Extra Example 4: Finding Simple Interest
17:46
Discount and Sales Tax

17m 15s

Intro
0:00
Discount
0:19
Discount
0:20
Sale Price
1:22
Sales Tax
2:24
Sales Tax
2:25
Total Due
2:59
Extra Example 1: Finding the Discount
3:43
Extra Example 2: Finding the Sale Price
6:28
Extra Example 3: Finding the Sale Tax
11:14
Extra Example 4: Finding the Total Due
14:08
Section 8: Geometry in a Plane
Intersecting Lines and Angle Measures

24m 17s

Intro
0:00
Intersecting Lines
0:07
Properties of Lines
0:08
When Two Lines Cross Each Other
1:55
Angles
2:56
Properties of Angles: Sides, Vertex, and Measure
2:57
Classifying Angles
7:18
Acute Angle
7:19
Right Angle
7:54
Obtuse Angle
8:03
Angle Relationships
8:56
Vertical Angles
8:57
Adjacent Angles
10:38
Complementary Angles
11:52
Supplementary Angles
12:54
Extra Example 1: Lines
16:00
Extra Example 2: Angles
18:22
Extra Example 3: Angle Relationships
20:05
Extra Example 4: Name the Measure of Angles
21:11
Angles of a Triangle

13m 35s

Intro
0:00
Angles of a Triangle
0:05
All Triangles Have Three Angles
0:06
Measure of Angles
2:16
Extra Example 1: Find the Missing Angle Measure
5:39
Extra Example 2: Angles of a Triangle
7:18
Extra Example 3: Angles of a Triangle
9:24
Classifying Triangles

15m 10s

Intro
0:00
Types of Triangles by Angles
0:05
Acute Triangle
0:06
Right Triangle
1:14
Obtuse Triangle
2:22
Classifying Triangles by Sides
4:18
Equilateral Triangle
4:20
Isosceles Triangle
5:21
Scalene Triangle
5:53
Extra Example 1: Classify the Triangle by Its Angles and Sides
6:34
Extra Example 2: Sketch the Figures
8:10
Extra Example 3: Classify the Triangle by Its Angles and Sides
9:55
Extra Example 4: Classify the Triangle by Its Angles and Sides
11:35
Quadrilaterals

17m 41s

Intro
0:00
Quadrilaterals
0:05
Definition of Quadrilaterals
0:06
Parallelogram
0:45
Rectangle
2:28
Rhombus
3:13
Square
3:53
Trapezoid
4:38
Parallelograms
5:33
Parallelogram, Rectangle, Rhombus, Trapezoid, and Square
5:35
Extra Example 1: Give the Most Exact Name for the Figure
11:37
Extra Example 2: Fill in the Blanks
13:31
Extra Example 3: Complete Each Statement with Always, Sometimes, or Never
14:37
Area of a Parallelogram

12m 44s

Intro
0:00
Area
0:06
Definition of Area
0:07
Area of a Parallelogram
2:00
Area of a Parallelogram
2:01
Extra Example 1: Find the Area of the Rectangle
4:30
Extra Example 2: Find the Area of the Parallelogram
5:29
Extra Example 3: Find the Area of the Parallelogram
7:22
Extra Example 4: Find the Area of the Shaded Region
8:55
Area of a Triangle

11m 29s

Intro
0:00
Area of a Triangle
0:05
Area of a Triangle: Equation and Example
0:06
Extra Example 1: Find the Area of the Triangles
1:31
Extra Example 2: Find the Area of the Figure
4:09
Extra Example 3: Find the Area of the Shaded Region
7:45
Circumference of a Circle

15m 4s

Intro
0:00
Segments in Circles
0:05
Radius
0:06
Diameter
1:08
Chord
1:49
Circumference
2:53
Circumference of a Circle
2:54
Extra Example 1: Name the Given Parts of the Circle
6:26
Extra Example 2: Find the Circumference of the Circle
7:54
Extra Example 3: Find the Circumference of Each Circle with the Given Measure
11:04
Area of a Circle

14m 43s

Intro
0:00
Area of a Circle
0:05
Area of a Circle: Equation and Example
0:06
Extra Example 1: Find the Area of the Circle
2:17
Extra Example 2: Find the Area of the Circle
5:47
Extra Example 3: Find the Area of the Shaded Region
9:24
Section 11: Geometry in Space
Prisms and Cylinders

21m 49s

Intro
0:00
Prisms
0:06
Polyhedron
0:07
Regular Prism, Bases, and Lateral Faces
1:44
Cylinders
9:37
Bases and Altitude
9:38
Extra Example 1: Classify Each Prism by the Shape of Its Bases
11:16
Extra Example 2: Name Two Different Edges, Faces, and Vertices of the Prism
15:44
Extra Example 3: Name the Solid of Each Object
17:58
Extra Example 4: Write True or False for Each Statement
19:47
Volume of a Rectangular Prism

8m 59s

Intro
0:00
Volume of a Rectangular Prism
0:06
Volume of a Rectangular Prism: Formula
0:07
Volume of a Rectangular Prism: Example
1:46
Extra Example 1: Find the Volume of the Rectangular Prism
3:39
Extra Example 2: Find the Volume of the Cube
5:00
Extra Example 3: Find the Volume of the Solid
5:56
Volume of a Triangular Prism

16m 15s

Intro
0:00
Volume of a Triangular Prism
0:06
Volume of a Triangular Prism: Formula
0:07
Extra Example 1: Find the Volume of the Triangular Prism
2:42
Extra Example 2: Find the Volume of the Triangular Prism
7:21
Extra Example 3: Find the Volume of the Solid
10:38
Volume of a Cylinder

15m 55s

Intro
0:00
Volume of a Cylinder
0:05
Volume of a Cylinder: Formula
0:06
Extra Example 1: Find the Volume of the Cylinder
1:52
Extra Example 2: Find the Volume of the Cylinder
7:38
Extra Example 3: Find the Volume of the Cylinder
11:25
Surface Area of a Prism

23m 28s

Intro
0:00
Surface Area of a Prism
0:06
Surface Area of a Prism
0:07
Lateral Area of a Prism
2:12
Lateral Area of a Prism
2:13
Extra Example 1: Find the Surface Area of the Rectangular Prism
7:08
Extra Example 2: Find the Lateral Area and the Surface Area of the Cube
12:05
Extra Example 3: Find the Surface Area of the Triangular Prism
17:13
Surface Area of a Cylinder

27m 41s

Intro
0:00
Surface Area of a Cylinder
0:06
Introduction to Surface Area of a Cylinder
0:07
Surface Area of a Cylinder
1:33
Formula
1:34
Extra Example 1: Find the Surface Area of the Cylinder
5:51
Extra Example 2: Find the Surface Area of the Cylinder
13:51
Extra Example 3: Find the Surface Area of the Cylinder
20:57
Section 10: Data Analysis and Statistics
Measures of Central Tendency

24m 32s

Intro
0:00
Measures of Central Tendency
0:06
Mean
1:17
Median
2:42
Mode
5:41
Extra Example 1: Find the Mean, Median, and Mode for the Following Set of Data
6:24
Extra Example 2: Find the Mean, Median, and Mode for the Following Set of Data
11:14
Extra Example 3: Find the Mean, Median, and Mode for the Following Set of Data
15:13
Extra Example 4: Find the Three Measures of the Central Tendency
19:12
Histograms

19m 43s

Intro
0:00
Histograms
0:05
Definition and Example
0:06
Extra Example 1: Draw a Histogram for the Frequency Table
6:14
Extra Example 2: Create a Histogram of the Data
8:48
Extra Example 3: Create a Histogram of the Following Test Scores
14:17
Box-and-Whisker Plot

17m 54s

Intro
0:00
Box-and-Whisker Plot
0:05
Median, Lower & Upper Quartile, Lower & Upper Extreme
0:06
Extra Example 1: Name the Median, Lower & Upper Quartile, Lower & Upper Extreme
6:04
Extra Example 2: Draw a Box-and-Whisker Plot Given the Information
7:35
Extra Example 3: Find the Median, Lower & Upper Quartile, Lower & Upper Extreme
9:31
Extra Example 4: Draw a Box-and-Whiskers Plots for the Set of Data
12:50
Stem-and-Leaf Plots

17m 42s

Intro
0:00
Stem-and-Leaf Plots
0:05
Stem-and-Leaf Plots
0:06
Extra Example 1: Use the Data to Create a Stem-and-Leaf Plot
2:28
Extra Example 2: List All the Numbers in the Stem-and-Leaf Plot in Order From Least to Greatest
7:02
Extra Example 3: Create a Stem-and-Leaf Plot of the Data & Find the Median and the Mode.
8:59
The Coordinate Plane

19m 59s

Intro
0:00
The Coordinate System
0:05
The Coordinate Plane
0:06
Quadrants, Origin, and Ordered Pair
0:50
The Coordinate Plane
7:02
Write the Coordinates for Points A, B, and C
7:03
Extra Example 1: Graph Each Point on the Coordinate Plane
9:03
Extra Example 2: Write the Coordinate and Quadrant for Each Point
11:05
Extra Example 3: Name Two Points From Each of the Four Quadrants
13:13
Extra Example 4: Graph Each Point on the Same Coordinate Plane
17:47
Section 11: Probability and Discrete Mathematics
Organizing Possible Outcomes

15m 35s

Intro
0:00
Compound Events
0:08
Compound Events
0:09
Fundamental Counting Principle
3:35
Extra Example 1: Create a List of All the Possible Outcomes
4:47
Extra Example 2: Create a Tree Diagram For All the Possible Outcomes
6:34
Extra Example 3: Create a Tree Diagram For All the Possible Outcomes
10:00
Extra Example 4: Fundamental Counting Principle
12:41
Independent and Dependent Events

35m 19s

Intro
0:00
Independent Events
0:11
Definition
0:12
Example 1: Independent Event
1:45
Example 2: Two Independent Events
4:48
Dependent Events
9:09
Definition
9:10
Example: Dependent Events
10:10
Extra Example 1: Determine If the Two Events are Independent or Dependent Events
13:38
Extra Example 2: Find the Probability of Each Pair of Events
18:11
Extra Example 3: Use the Spinner to Find Each Probability
21:42
Extra Example 4: Find the Probability of Each Pair of Events
25:49
Disjoint Events

12m 13s

Intro
0:00
Disjoint Events
0:06
Definition and Example
0:07
Extra Example 1: Disjoint & Not Disjoint Events
3:08
Extra Example 2: Disjoint & Not Disjoint Events
4:23
Extra Example 3: Independent, Dependent, and Disjoint Events
6:30
Probability of an Event Not Occurring

20m 5s

Intro
0:00
Event Not Occurring
0:07
Formula and Example
0:08
Extra Example 1: Use the Spinner to Find Each Probability
7:24
Extra Example 2: Probability of Event Not Occurring
11:21
Extra Example 3: Probability of Event Not Occurring
15:51
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Lecture Comments (17)

0 answers

Post by Jason Sun on May 19, 2020

This is interesting

1 answer

Last reply by: SIMON XENITELLIS
Thu Jul 4, 2019 3:49 PM

Post by LeTaotao Xue on September 22, 2018

why do you need to flip the fractions to change the operation

0 answers

Post by Mohamed Loirraqi on January 7, 2016

Why we flip when we multiply?

1 answer

Last reply by: Jason Sun
Tue May 19, 2020 9:46 AM

Post by Mohamed Loirraqi on January 7, 2016

Why we flip when we multiply?

0 answers

Post by EN N on November 8, 2015

Hello,
In practice question number 9, the answer and steps are wrong. The question is 6 1/2 divided by 9 1/2. For step one it says 13/2 divided by 28/2.

0 answers

Post by Oscar Prado on September 15, 2015

How can you simplify the answer instead of the problem?

1 answer

Last reply by: Professor Pyo
Thu Jan 2, 2014 5:05 PM

Post by Dmitry Kischukov on December 26, 2013

can i multiplay like a  g
                    _ . _ =y
                    r   t

1 answer

Last reply by: Professor Pyo
Thu Jan 2, 2014 4:59 PM

Post by Mashrur Elahi on April 25, 2013

Can you use parentheses for fractions?

2 answers

Last reply by: LeTaotao Xue
Sat Sep 22, 2018 3:57 PM

Post by Anwar Alasmari on January 2, 2013

Yes, you can, but you may face some difficults to simplify them that you have to take into consideration the position of numbers. I think you can follow an easy way (as showed on this lecture) to solve any problems.

1 answer

Last reply by: Mary Pyo
Fri Aug 19, 2011 11:46 PM

Post by Carlos Garcia on July 19, 2011

Hello,
I have a question. Can I simplify the fractions when they are dividing before coverting it into a multiplication?

Dividing Fractions and Mixed Numbers

Related Links

  • Change mixed numbers to improper fractions
  • Flip the second fraction by switching the top and bottom numbers (that is, switch the numerator with the denominator)
  • Multiply the fractions
  • If the quotient is an improper fraction, convert it to a mixed number

Dividing Fractions and Mixed Numbers

Divide the fractions:
[2/5] ÷[3/4]
  • [2/4] ×[4/3]
[8/12] or [2/3]
Divide the fractions:
[3/7] ÷[4/5]
  • [3/7] ×[5/4]
[15/28]
Divide the fractions:
3[2/5] ÷4[1/4]
  • [17/5] ÷[17/4]
  • [17/5] ×[4/17]
[68/85] or [4/5]
Divide the fractions:
5[1/5] ÷4[5/6]
  • [26/5] ÷[29/6]
  • [26/5] ×[6/29]
[156/145] or 1[11/145]
Divide the fractions:
1[7/8] ÷3[6/11]
  • [15/8] ÷[39/11]
  • [15/8] ×[11/39]
[165/312] or [55/104]
Divide the fraction:
[1/2] ÷3[3/4]
  • [1/2] ÷[15/4]
  • [1/2] ×[4/15]
[4/30] or [2/15]
Divide the fraction:
[3/4] ÷5[1/2]
  • [3/4] ÷[11/2]
  • [3/4] ×[2/11]
[6/44] or [3/22]
Divide the fraction:
[4/5] ÷4[4/6]
  • [4/5] ÷[28/6]
  • [4/5] ×[6/28]
[24/140] or [6/35]
Divide the fraction:
6[1/2] ÷9[1/2]
  • [13/2] ÷[28/2]
  • [13/2] ×[2/28]
[26/56] or [13/28]
Divide the fraction:
4[3/5] ÷8[4/5]
  • [23/5] ÷[44/5]
  • [23/5] ×[5/44]
[115/220] or [23/44]

*These practice questions are only helpful when you work on them offline on a piece of paper and then use the solution steps function to check your answer.

Answer

Dividing Fractions and Mixed Numbers

Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.

  • Intro 0:00
  • Dividing Fractions 0:09
    • Step 1: Change Mixed Numbers to Improper Fractions
    • Step 2: Flip the Second Fraction
    • Step 3: Multiply the Fractions
  • Extra Example 1: Dividing Fractions 1:23
  • Extra Example 2: Dividing Fractions 5:06
  • Extra Example 3: Dividing Fractions 9:34
  • Extra Example 4: Dividing Fractions 12:06

Transcription: Dividing Fractions and Mixed Numbers

Welcome back to Educator.com.0000

The next lesson is on dividing fractions including fractions that are mixed numbers.0002

In the same way that we multiply fractions,0013

when we divide fractions, we have to make sure that we have no mixed numbers.0015

If you do have mixed numbers, make sure to change them to an improper fraction.0020

When you have a fraction A/B and you are dividing it by another fraction C/D,0028

what you are going to do is take the second fraction and you are going to flip it.0035

You are just going to make this number, the top number, the bottom number.0044

Then the bottom number becomes your top number.0049

When you do that, you are going to change the division to a multiplication sign.0052

Now your problem becomes A/B times D/C.0058

You are going to multiply the fractions the same way.0065

Again take the second fraction and flip it.0069

When you flip it, it is going to go from dividing to multiplying.0074

Let's do a few examples; 2/3 divided by 3/4; I have no mixed numbers.0083

I can go ahead and work with these fractions right here, 2/3.0094

I am going to switch this sign to a multiplication sign because I am going to take this fraction right here.0101

My 4, my denominator, becomes my numerator; my numerator becomes my denominator.0110

Don't forget; if you flip the first fraction, you are going to get it wrong.0119

Make it is not the first fraction; it is the second fraction that you flip.0124

From here, I am going to multiply my numerators.0129

2 times 4 is 8; 3 times 3 is 9.0135

2/3 divided by 3/4 is 8/9.0143

The next example, 1 and 2/5 divided by 2 and 3/5.0151

Both of my fractions are mixed numbers.0156

I have to make sure to change them to improper fractions before I go ahead and divide them.0159

When you change it from a mixed number to an improper fraction, you take the bottom number 5.0167

Multiply it to your whole number and add the top number.0172

You are going to go 5 times 1 is 5; plus 2 is 7.0177

It is 7/5 divided by... 5 times 2 is 10, plus 3 is 13; 13/5.0182

Look at how I kept the division sign.0199

I can only switch it to multiplication when I flip my top and bottom numbers.0201

For now, I didn't flip it yet.0209

All I did was just convert this mixed number to an improper fraction.0210

I had to keep this sign.0214

My next step, I am going to make it a multiplication problem by flipping these.0219

My 5 now goes on the top.0226

My 13 is going to go on the bottom.0228

Remember from last lesson, if I have this problem right here, I can see if a number from the top0233

and a number from the bottom can reduce, can simplify if they have common factors.0242

7 and 13 have no common factors because they are both prime.0249

7 is a prime number; 13 is a prime number.0253

The only common factor between them would be 1.0256

This 5 and the 5 up here, they have a common factor of 5.0260

They are the same numbers so their common factor would be itself.0267

I can simplify these numbers by dividing their common factor of 5.0272

I am going to take this 5; divide it by 5 which is 1.0277

Then this number divided by 5; that also becomes 1.0282

Now I can multiply the top numbers together and then multiply my bottom numbers together.0289

7 times 1 is 7; 1 times 13 is 13; that is my answer.0295

Some more examples, 6/5 divided by 3/4.0307

Since none of these are mixed numbers, I can go ahead and just work with those.0315

Since I am dividing, I can now multiply after switching these.0324

It becomes 4/3; again you can just multiply them.0329

Just do 6 times 4, 24, over 5 times 3 which is 15; then simplify that fraction.0338

Or you can simplify the problem--this is the problem--by seeing if any numbers have common factors.0346

Again 6 and 4, this number 6 and this number 4 have a common factor of 2 because they are both even numbers.0356

But I can't cancel those out because they are both on the top.0362

Whenever you cancel numbers out, make sure that one of them is on the top and one of them is on the bottom.0368

I can only do maybe 5 and 4.0374

But they don't have any common factors besides 1.0377

6 and 3 have a common factor of 3.0381

3 divided by 3 is 1; 6 divided by 3 is 2.0388

Make sure you divide both numbers by that same factor.0394

Now I am going to multiply; 2 times 4 is 8.0401

5 times 1 is 5; that is an improper fraction.0407

But I can leave it like; that is my answer.0412

The next example, 4 and 1/4 divided by 5/3.0417

I have a mixed number; I need to convert that.0423

4 times 4 is 16; plus 1 is 17; 17/4 divided by 5/3.0427

I didn't change it yet because I didn't flip this fraction.0443

17/4 times 3/5; make sure it is the second fraction that you flip.0448

From here, let's see, 17 with 5; no, they don't have any common factors.0461

4 with 3?--nope, no common factors besides 1.0469

I have to just solve it out; 17 times 3; and then 4 times 5.0474

17 times 3; let's do that problem.0481

7 times 3 is 21; the 2 up here; 1 down here.0485

Multiply these two and then add that number.0492

3, 5; 51 over... 4 times 5 is 20; this is my answer.0494

You can change it to a mixed number if you would like.0509

All you are going to do is see how many times 20 is going to fit into 51.0512

That is going to be your whole number.0518

How many you have left over is your numerator; keep the same denominator of 20.0521

Let's just do that; 20 is going to fit into 51 two times.0527

If you do it two times, it is 51 divided by 20.0534

It is going to fit in there two times; that becomes 40.0541

I have 11 left over; I can write it like this.0545

Or I can write it like... 2 is my whole number; I have 11 left over... over 20.0551

Either fraction, improper or mixed number, is going to be your answer.0564

You can leave it this way; or you can write it this way.0568

Few more examples, 7/8; you can divide and then change this fraction.0575

9 times 3 is 27; add the 2; that is 29/9.0586

I am going to do 7/8 times 9/29.0595

8 and 9 have no common factors; 7/9 have no common factors.0606

I can go 9 with 29; I can compare those two.0611

But nothing has any common factors for me to simplify or to reduce.0617

I am going to multiply; 9 times 7 is 63; 29 times 8.0623

29 times 8; 9 times 8 is 72; 8 times 2 is 16.0632

Plus 7 is 23; that is 232.0641

I know they have no common factors because none of these were able to reduce.0653

This will be my final answer.0658

The next example, 5/4 divided by 9/11; that is my problem.0663

Before I start cancelling numbers out, I have to make sure I change this to a multiplication problem first.0674

5/4 times 11/9; don't forget to flip this one.0683

Let's see; 11 with 9--no; 11 with 4--no; 5 with 9--no.0692

None of these have any common factors for me to cross cancel numbers out.0700

5 times 11 is 55; 4 times 9 is 36; that is my answer.0710

The next couple of examples, I have 3 and 3/7 divided by 6 and 1/4.0726

These are both mixed numbers; I have to convert them to improper fractions.0734

I take my denominator of 7, multiply it to my whole number, and then add the numerator.0743

7 times 3 is 21; plus 3 is 24;0749

Then 4 times 6 is 24; plus 1 is 25.0758

Make sure you keep the same denominator.0767

Now I can go ahead and divide these fractions.0772

For me to divide fractions, I have to take my second fraction and flip it.0774

My top number is going to become my bottom number.0780

My bottom number will become the top number; let's write it right here.0782

Once I flip it, I am going to change my sign to multiplication.0790

It is going to be 24/7 times 4/25.0797

Make sure you flip the second one and not the first one.0804

If you flip the first one, you are going to get the wrong answer.0806

It is 24/7 times 4/25.0809

You are going to see if you can cancel any of these numbers out.0816

Make sure that one number is the numerator and another number is in the denominator position.0820

7 with 4, they have no common factors because 7 is a prime number.0826

24 and 25 also have no common factors.0834

You are going to have to multiply the top numbers and then multiply the bottom numbers together to get your answer.0839

24 times 4; 24 times 4; 4 times 4 is 16.0845

I put the 1 right here; 6 down there.0853

4 times 2 is 8; add the 1; 9; this becomes 96 over... 25 times 7.0856

5 times 7 is 35; I put the 3 up here; 5 right there.0869

7 times 2 is 14; plus 3 is 17; this is 175.0875

Since none of these were able to reduce or cross cancel, I know that this is my answer.0887

The next example, 2 and 4/5 divided by 10/3.0898

10/3 is an improper fraction; I can leave that as it is.0903

This one I have to convert; 5 times 2 is 10.0908

Plus the 4 is 14; 14/5 divided by 10/3.0915

I am going to flip the second fraction so that the top number and my bottom number switch positions.0930

That changes this division to multiplication; 14/5 times 3/10.0938

From here, now that it is a multiplication problem, I can see if any numbers will cross cancel.0953

5 and 3 have no common factors because they are both prime numbers.0960

14 and 10 have a common factor.0965

Before we do that, let me just point out... 5 and 10, I have a common factor of 5.0969

5 goes into both of these numbers.0977

But remember you can't cancel those out because they are both denominators.0979

They are both on the bottom.0985

When you cancel numbers out, you have to make sure that0987

one of them is on the top and another one is on the bottom.0990

Since 14 is on the top and 10 is on the bottom, I can cross cancel those numbers out.0996

A common factor between 14 and 10 is 2 because they are both even numbers.1003

I am going to take both numbers and divide it by that common factor.1011

Since the common factor is 2, I am going to divide this number by 2.1017

That is 5; then take the 14, divide it by 2; that becomes 7.1021

You have to make sure that you are going to divide by the same factor.1028

There are no more; 7 and 5, they have no common factors.1036

I can go ahead and multiply them.1041

7 times 3 is 21; 5 times 5 is 25; that is your answer.1042

Make sure when you divide fractions, number one, convert all mixed numbers to improper fractions.1058

Then you are going to switch the second fraction.1065

The top number becomes the bottom number; the bottom number becomes the top number.1069

Then you are going to multiply those fractions together.1073

That is it for this lesson; thank you for watching Educator.com.1077

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