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Course

# Arithmetic

The most basic of the math playlists. Start here if you have very little background in math fundamentals (or just want to make sure you do). After watching this playlist, you should be ready for the pre-algebra playlist.

Home > Mathematics > Arithmetic Lectures:

00:07:42Salman Khan

00:12:26Salman Khan

00:09:48Salman Khan

Adding a 2 Digit Number to a 1 Digit Number. Introduction to Carrying.

00:08:57Salman Khan

Practice Carrying Digits to Add Multiple Digit Numbers.

00:08:49Salman Khan

More Practice Carrying with Multiple Digit Numbers.

• ### Basic Subtraction

00:08:32Salman Khan

Introduction to Subtraction.

• ### Subtraction 2

00:12:32Salman Khan

Different Ways to View Subtraction.

• ### Subtraction 3: Introduction to Borrowing or Regrouping

00:18:26Salman Khan

Introduction to Borrowing and Regrouping.

• ### Alternate Mental Subtraction Method

00:05:10Salman Khan

How I Subtract in My Head.

• ### Why Borrowing Works

00:08:33Salman Khan

An Explanation of Why (not how) Borrowing/regrouping Works When Subtracting Numbers.

• ### Level 4 Subtraction

00:08:47Salman Khan

Subtraction of Multi-digit Numbers Involving Borrowing.

00:07:40Salman Khan

• ### Subtracting Decimals

00:08:32Salman Khan

Subtracting Decimal Numbers.

• ### Basic Multiplication

00:13:20Salman Khan

Introduction to Multiplication.

• ### Multiplication 2: The Multiplication Tables

00:15:27Salman Khan

Introduction to the Multiplication Tables From 2-9.

• ### Multiplication 3: 10,11,12 Times Tables

00:12:11Salman Khan

Multiplication 3: Learning to Multiply 10, 11, and 12.

• ### Multiplication 5: 2-digit Times a 2-digit Number

00:11:15Salman Khan

Multiplying a 2-digit Number Times a 2-digit Number.

• ### Multiplication 6: Multiple Digit Numbers

00:10:27Salman Khan

Working Our Way Up to Multiplying Multiple-digit Numbers With Each Other.

• ### Multiplication 7: Old Video Giving More Examples

00:06:17Salman Khan

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.

• ### Mulitplication 8: Multiplying Decimals (Old video)

00:09:44Salman Khan

Multiplying decimals.

• ### Lattice Multiplication

00:07:15Salman Khan

Introduction to Lattice Multiplication.

• ### Why Lattice Multiplication Works

00:08:21Salman Khan

Understanding Why Lattice Multiplication Works.

• ### Division 1

00:17:02Salman Khan

Introduction to Division.

• ### Division 2

00:11:39Salman Khan

Dividing into Larger Numbers. Introduction to Long Division and Remainders.

• ### Division 3: More Long Division and Remainder Examples

00:10:07Salman Khan

More Long Division and Remainder Examples.

• ### Level 4 Division

00:09:35Salman Khan

Dividing a Two Digit Number into a Larger Number.

• ### Converting Fractions to Decimals

00:09:22Salman Khan

How to Express a Fraction as a Decimal.

• ### Percent and Decimals

00:10:26Salman Khan

Expressing Percentages as Decimals. Expressing Decimals as Percentages.

• ### Dividing Decimals

00:09:27Salman Khan

Dividing Decimal Numbers.

• ### Ordering Numeric Expressions

00:09:22Salman Khan

Ordering Numbers Expressed as Decimals, Fractions, and Percentages.

• ### Greatest Common Divisor

00:06:18Salman Khan

4 example Problems of Determining the Greatest Common Factor of Two Numbers by Factoring the 2 Numbers First.

• ### Equivalent Fractions

00:05:49Salman Khan

Introduces the concept of equivalent fractions.

• ### Mixed Numbers and Improper Fractions

00:09:13Salman Khan

Converting mixed numbers to improper fractions and improper fractions to mixed numbers.