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.

## 35 Lectures

00:07:42

00:09:48

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

00:08:57

Practice Carrying Digits to Add Multiple Digit Numbers.

00:08:49

More Practice Carrying with Multiple Digit Numbers.

• ### Basic Subtraction

00:08:32

Introduction to Subtraction.

• ### Subtraction 2

00:12:32

Different Ways to View Subtraction.

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

00:18:26

Introduction to Borrowing and Regrouping.

• ### Alternate Mental Subtraction Method

00:05:10

How I Subtract in My Head.

• ### Why Borrowing Works

00:08:33

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

• ### Level 4 Subtraction

00:08:47

Subtraction of Multi-digit Numbers Involving Borrowing.

• ### Subtracting Decimals

00:08:32

Subtracting Decimal Numbers.

• ### Basic Multiplication

00:13:20

Introduction to Multiplication.

• ### Multiplication 2: The Multiplication Tables

00:15:27

Introduction to the Multiplication Tables From 2-9.

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

00:12:11

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

• ### Multiplication 4: 2-digit Times 1-digit Number

00:12:08

Multiplying a 2-digit Times a 1-digit Number.

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

00:11:15

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

• ### Multiplication 6: Multiple Digit Numbers

00:10:27

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

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

00:06:17

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)

00:09:44

Multiplying decimals.

• ### Lattice Multiplication

00:07:15

Introduction to Lattice Multiplication.

• ### Why Lattice Multiplication Works

00:08:21

Understanding Why Lattice Multiplication Works.

• ### Division 1

00:17:02

Introduction to Division.

• ### Division 2

00:11:39

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

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

00:10:07

More Long Division and Remainder Examples.

• ### Level 4 Division

00:09:35

Dividing a Two Digit Number into a Larger Number.

• ### Converting Fractions to Decimals

00:09:22

How to Express a Fraction as a Decimal.

• ### Percent and Decimals

00:10:26

Expressing Percentages as Decimals. Expressing Decimals as Percentages.

• ### Dividing Decimals

00:09:27

Dividing Decimal Numbers.

• ### Ordering Numeric Expressions

00:09:22

Ordering Numbers Expressed as Decimals, Fractions, and Percentages.

• ### Greatest Common Divisor

00:06:18

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

• ### Least Common Multiple

00:04:01

Example of figuring out the least common multiple of two nunmbers.

00:05:49