Art of Problem Solving
Introduction to Division
Use reciprocals for the purpose of division. The video shows how to use reciprocals to rewrite division problems. Pupils see that the definition of division as the multiplication by the reciprocal works for all types of numbers.
Krista King Math
Reciprocals
Teach the concept of a reciprocal using this short video lesson. A video tutorial defines a reciprocal as the multiplicative inverse and then demonstrates several examples of finding the inverse. The instructor also explains the...
Khan Academy
Khan Academy: Arithmetic and Pre Algebra: Dividing Mixed Numbers
This video expains how to divide two mixed numbers and write the answer as a mixed number. Practice problems are available. [2:40]
Khan Academy
Khan Academy: Arithmetic and Pre Algebra: Reciprocal of a Mixed Number
This video explains how to find the reciprocal of a mixed number. [1:41]
PBS
Pbs Learning Media: I <3 Math: Division With Fractions and Whole Numbers
This "I <3 Math" episode illustrates how to divide fractions by whole numbers, and how to divide whole numbers by fractions. [2:45]
Khan Academy
Khan Academy: Dividing Mixed Numbers and Fractions
This video expains how to divide a mixed number by a fraction and write the answer as a mixed number.
Math Mammoth
Math Mammoth: How to Divide Fractions and Reciprocal Numbers
Explains what a reciprocal number is, also called a multiplicative inverse, and how to use the reciprocal to divide a number or a fraction by a fraction. [10:32]
Khan Academy
Khan Academy: Understanding Fractions as Division
Uses fraction bars to demonstrate how multiplication and division are related. Shows how a fraction is really just a division problem, e.g., 3/4 x 4 equals 3 divided into 4 sets of 3/4. [6:44]
Khan Academy
Khan Academy: Dividing Fractions by Fractions
Explains how one can divide a fraction by a fraction by inverting the divisor and multiplying. [5:41]
Math Playground
Math Playground: Dividing Fractions Do You Always Have to Invert and Multiply?
This video illustrates how to divide fractions. The instructor emphasizes that you do not always have to invert and multiply when dividing fractions.
Math Playground
Math Playground: How Do You Find a Fraction of a Group?
This video illustrates how to calculate a fraction of a group of items.
Khan Academy
Khan Academy: Creating a Fraction Through Division
Video lesson explains how to create a fraction through division using the example 3 / 2 is the same as 3 x 1/2, which is the same as 3/2. [2:44]
CK-12 Foundation
Ck 12: Elem Math: Dividing Fractions by Fractions
[Free Registration/Login may be required to access all resource tools.] Video explaining how to divide a fraction by a fraction. [1:02]
Khan Academy
Khan Academy: Multiplying and Dividing Fractions: Dividing Fractions
This video provides a clear explanation and plenty of examples of dividing fractions.
Imagine Learning Classroom
Learn Zillion: Divide by Unit Fractions: Using the Number Line
In this lesson, you will learn how to divide by unit fractions by using the number line. Additional resources are available with site login. [5:01]
Math Mammoth
Math Mammoth: Divide Fractions by Whole Numbers and by Fractions: Even Divisions
Explains using visual models how to divide a simple fraction by a whole number or another basic fraction. [10:31]
Other
Math Tutor Dvd: Review of Improper Fractions 5th Grade Math
Video lesson reviews the concept of an improper fraction in which the numerator is larger than the denominator. [11:26]
Khan Academy
Khan Academy: Multiplying and Dividing Fractions: Dividing Fractions Example
This video explains how to divide two fractions and write the answer as a mixed number.
Khan Academy
Khan Academy: Creating a Fraction Through Division
Demonstrates how dividing the number 3 by 2 is the same thing as dividing it by 1/2. [2:45]
CK-12 Foundation
Ck 12: Elem Math: Dividing Whole Numbers by Fractions
[Free Registration/Login may be required to access all resource tools.] Video explaining how to divide a whole number by a fraction. [1:28]
Khan Academy
Khan Academy: Dividing a Unit Fraction by a Whole Number
Sal uses a visual model to divide a unit fraction by a whole number.
Khan Academy
Khan Academy: Dividing a Whole Number by a Unit Fraction
Sal uses a fraction model to divide a whole number by a fraction.
PBS
Pbs Learning Media: Modeling Fraction Multiplication Using Arrays
This video (2:53) illustrates a word problem involving the multiplication of fractions using an array to model the solution visually. The problem involves puffins, arctic birds that live in colonies and fish to feed their young. The...
Sophia Learning
Sophia: Dividing Whole Numbers by Fractions: Lesson 4
This lesson goes over how to divide a whole number by a fraction. It is 4 of 11 in the series titled "Dividing Whole Numbers by Fractions."