# 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.

• ##### Basic Addition
Salman Khan

Introduction to Addition. Multiple Visual Ways to Represent Addition.

Salman Khan

• ##### Level 2 Addition
Salman Khan

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

• ##### Addition 3
Salman Khan

Practice Carrying Digits to Add Multiple Digit Numbers.

• ##### Addition 4
Salman Khan

More Practice Carrying with Multiple Digit Numbers.

• ##### Basic Subtraction
Salman Khan

Introduction to Subtraction.

• ##### Subtraction 2
Salman Khan

Different Ways to View Subtraction.

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

Introduction to Borrowing and Regrouping.

• ##### Alternate Mental Subtraction Method
Salman Khan

How I Subtract in My Head.

• ##### Why Borrowing Works
Salman Khan

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

• ##### Level 4 Subtraction
Salman Khan

Subtraction of Multi-digit Numbers Involving Borrowing.

Salman Khan

• ##### Subtracting Decimals
Salman Khan

Subtracting Decimal Numbers.

• ##### Basic Multiplication
Salman Khan

Introduction to Multiplication.

• ##### Multiplication 2: The Multiplication Tables
Salman Khan

Introduction to the Multiplication Tables From 2-9.

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

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

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

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

• ##### Multiplication 6: Multiple Digit Numbers
Salman Khan

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

• ##### Multiplication 7: Old Video Giving More Examples
Salman 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)
Salman Khan

Multiplying decimals.

• ##### Lattice Multiplication
Salman Khan

Introduction to Lattice Multiplication.

• ##### Why Lattice Multiplication Works
Salman Khan

Understanding Why Lattice Multiplication Works.

• ##### Division 1
Salman Khan

Introduction to Division.

• ##### Division 2
Salman Khan

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

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

More Long Division and Remainder Examples.

• ##### Level 4 Division
Salman Khan

Dividing a Two Digit Number into a Larger Number.

• ##### Converting Fractions to Decimals
Salman Khan

How to Express a Fraction as a Decimal.

• ##### Percent and Decimals
Salman Khan

Expressing Percentages as Decimals. Expressing Decimals as Percentages.

• ##### Dividing Decimals
Salman Khan

Dividing Decimal Numbers.

• ##### Ordering Numeric Expressions
Salman Khan

Ordering Numbers Expressed as Decimals, Fractions, and Percentages.

• ##### Greatest Common Divisor
Salman Khan

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

• ##### Equivalent Fractions
Salman Khan

Introduces the concept of equivalent fractions.

• ##### Mixed Numbers and Improper Fractions
Salman Khan

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