Khan Academy on a Stick : Multiplication and division

Khan Academy on a Stick

Arithmetic and pre-algebra

Addition and subtraction
Multiplication and division
Factors and multiples
Negative numbers and absolute value
Decimals
Fractions
Ratios, proportions, units and rates
Exponents, radicals, and scientific notation
Applying mathematical reasoning
Arithmetic properties

Basic Multiplication
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Introduction to multiplication
Multiplication 2: The Multiplication Tables
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Introduction to the multiplication tables from 2-9.
Example: Ways to represent multiplication
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Multiplying Whole Numbers and Applications 1
Multiplication 3: 10,11,12 times tables
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Multiplication 3: Learning to multiply 10, 11, and 12.

Basic multiplication

If 3 kids each have two robot possums, how many total robot possums do we have? You liked addition, but now you're ready to go to the next level. Depending on how you view it, multiplication is about repeated addition or scaling a number or seeing what number you get when you have another number multiple times. If that last sentence made little sense, you might enjoy this tutorial.

Division 1
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Introduction to division
Example: Expressing division in multiple ways
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Dividing Whole Numbers and Applications 1

One-digit division

Every time you split your avocado harvest with your 10 pet robot possums, you've been dividing. You don't farm avocados? You only have 8 robot possums? No worries. I'm sure you've divided as well. Multiplication is awesome, but you're ready for the next step. Division is the art of trying to split things into equal groups. Like subtraction undoes addition, division also undoes multiplication. After this tutorial, you'll have a basic understanding of all of the core operations in arithmetic!

Example: 1-digit multiplication word problem
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Multiplying Whole Numbers and Applications 6
Multiplication word problem example 1
Division word problem example 1
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Starter multiplication and division word problems

Math is super useful in the real world. In this tutorial, we'll get some practice figuring out things that would have been tough without the powerful tools of multiplication and division!

Multiplying by multiples of 10
2-digit times 1-digit number
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Multiplying a 2-digit times a 1-digit number
2 digit times 1 digit example (no carrying)
3 digit times 1 digit example (no carrying)
2 digit times 1 digit example
3 digit times 1 digit example
4 digit times 1 digit example
2-digit times a 2-digit number
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Multiplying a 2-digit number times a 2-digit number
Example: 2-digit times 2-digit
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Multiplying Whole Numbers and Applications 2
Multiple Digit Numbers
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Working our way up to multiplying multiple-digit numbers with each other
Multiplication estimation example
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Estimating the product of two, 2-digit numbers
Multiplication 7: Old video giving more examples
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2 examples of multiplying a 3 digit number times a 2 digit number. 1 example of multiplying a 3 digit number times a 3 digit number.

Multi-digit multiplication

You know your multiplication tables and are ready to learn how to multiply *any* number (actually, any whole number). Imagine the possibilities! This tutorial will make you unstoppable.

Introduction to long division
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Dividing into larger numbers. Introduction to long division without remainders
Introduction to remainders
Long division with remainder example
More long division without and with remainders
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More long division and remainder examples
Dividing by a two digit number
Level 4 division
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Dividing a two digit number into a larger number

Loooong division!

You know your multiplication tables and are getting the hang of basic division. In this tutorial, we will journey into the world of loooong division (sometimes, referred to as "long division", but that's not as much fun to say). After this tutorial, you'll be able to divide any whole number by any other. The fun will not stop!

Lattice Multiplication
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Introduction to lattice multiplication
Why Lattice Multiplication Works
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Understanding why lattice multiplication works

Lattice multiplication

Tired of "standard multiplication". In this tutorial we'll explore a different way. Not only is lattice multiplication interesting, it'll help us appreciate that there are many ways to do things. We'll also try to grasp why it works in the first place. Enjoy!

Partial Quotient Division
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An alternate to traditional long division
Partial Quotient Method of Division 2
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Another example of doing long division using the partial quotient method

Partial quotient division

Feeling constrained by traditional long division? Want to impress your friends, family and even your enemies? Well, partial quotient division may be for you (or it might not). This very optional tutorial will show you that there are many ways to slice a walnut (just made up that colloquialism).

Fancy multiplication and division word problems

In this tutorial, we'll start to challenge you with more sophisticated multiplication and division word problems. If you understand mult-digit multiplication and long division, you have all the tools you need to tackle these. May the force be with you!

Area models and multiplication

Most of us learn to multiply eventually, but only a select-few actually understand what the multiplication represents. This tutorial, with the help of area models, will allow you to be part of this elite group.